121755716772 has 12 divisors (see below), whose sum is σ = 284096672496. Its totient is φ = 40585238920.

The previous prime is 121755716759. The next prime is 121755716807. The reversal of 121755716772 is 277617557121.

It is a happy number.

121755716772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 5073154854 + ... + 5073154877.

It is an arithmetic number, because the mean of its divisors is an integer number (23674722708).

Almost surely, 2^121755716772 is an apocalyptic number.

121755716772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121755716772 is an abundant number, since it is smaller than the sum of its proper divisors (162340955724).

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

121755716772 is a wasteful number, since it uses less digits than its factorization.

121755716772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10146309738 (or 10146309736 counting only the distinct ones).

The product of its digits is 1440600, while the sum is 51.

The spelling of 121755716772 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred sixteen thousand, seven hundred seventy-two".