
integer, natural,
positive, counting number, odd
121 ― 90th composite number,
divisible by 1, 11 & 121
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112
001100010011001000110001%31%32%31121121\0031\0032\0031\31\32\31\u0031\u0032\u0031\u{31}\u{32}\u{31}\x31\x32\x31