121761256604 has 24 divisors (see below), whose sum is σ = 231280025088. Its totient is φ = 55755000000.

The previous prime is 121761256579. The next prime is 121761256613. The reversal of 121761256604 is 406652167121.

It is a super-2 number, since 2×121761256604² (a number of 23 digits) contains 22 as substring.

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, 9212147 + ... + 9225354.

It is an arithmetic number, because the mean of its divisors is an integer number (9636667712).

Almost surely, 2^121761256604 is an apocalyptic number.

It is an amenable number.

121761256604 is a deficient number, since it is larger than the sum of its proper divisors (109518768484).

121761256604 is a wasteful number, since it uses less digits than its factorization.

121761256604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18437645 (or 18437643 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 121761256604 in words is "one hundred twenty-one billion, seven hundred sixty-one million, two hundred fifty-six thousand, six hundred four".