121951015572 has 24 divisors (see below), whose sum is σ = 285467337792. Its totient is φ = 40519628800.

The previous prime is 121951015531. The next prime is 121951015583. The reversal of 121951015572 is 275510159121.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 121951015572.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16334829 + ... + 16342292.

It is an arithmetic number, because the mean of its divisors is an integer number (11894472408).

Almost surely, 2^121951015572 is an apocalyptic number.

121951015572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121951015572 is an abundant number, since it is smaller than the sum of its proper divisors (163516322220).

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

121951015572 is a wasteful number, since it uses less digits than its factorization.

121951015572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32677439 (or 32677437 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 39.

The spelling of 121951015572 in words is "one hundred twenty-one billion, nine hundred fifty-one million, fifteen thousand, five hundred seventy-two".