121757513312 has 24 divisors (see below), whose sum is σ = 242181348696. Its totient is φ = 60251139072.

The previous prime is 121757513291. The next prime is 121757513357. The reversal of 121757513312 is 213315757121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19609898 + ... + 19616105.

It is an arithmetic number, because the mean of its divisors is an integer number (10090889529).

Almost surely, 2^121757513312 is an apocalyptic number.

It is an amenable number.

121757513312 is a deficient number, since it is larger than the sum of its proper divisors (120423835384).

121757513312 is an equidigital number, since it uses as much as digits as its factorization.

121757513312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39226110 (or 39226102 counting only the distinct ones).

The product of its digits is 44100, while the sum is 38.

The spelling of 121757513312 in words is "one hundred twenty-one billion, seven hundred fifty-seven million, five hundred thirteen thousand, three hundred twelve".