121755370272 has 48 divisors (see below), whose sum is σ = 319629602880. Its totient is φ = 40582360832.

The previous prime is 121755370229. The next prime is 121755370283. The reversal of 121755370272 is 272073557121.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768429 + ... + 1835987.

It is an arithmetic number, because the mean of its divisors is an integer number (6658950060).

Almost surely, 2^121755370272 is an apocalyptic number.

121755370272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121755370272 is an abundant number, since it is smaller than the sum of its proper divisors (197874232608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121755370272 is a wasteful number, since it uses less digits than its factorization.

121755370272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86345 (or 86337 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 42.

The spelling of 121755370272 in words is "one hundred twenty-one billion, seven hundred fifty-five million, three hundred seventy thousand, two hundred seventy-two".