121041757656 has 48 divisors (see below), whose sum is σ = 345075190200. Its totient is φ = 38223712512.

The previous prime is 121041757651. The next prime is 121041757679. The reversal of 121041757656 is 656757140121.

121041757656 is a `hidden beast` number, since 1 + 2 + 10 + 4 + 17 + 576 + 56 = 666.

It is a super-2 number, since 2×121041757656² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121041757651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44239041 + ... + 44241776.

Almost surely, 2^121041757656 is an apocalyptic number.

It is an amenable number.

121041757656 is an abundant number, since it is smaller than the sum of its proper divisors (224033432544).

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

121041757656 is a wasteful number, since it uses less digits than its factorization.

121041757656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88480848 (or 88480841 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

Adding to 121041757656 its reverse (656757140121), we get a palindrome (777798897777).

The spelling of 121041757656 in words is "one hundred twenty-one billion, forty-one million, seven hundred fifty-seven thousand, six hundred fifty-six".