121635528685 has 16 divisors (see below), whose sum is σ = 159259738752. Its totient is φ = 88446772800.

The previous prime is 121635528671. The next prime is 121635528737. The reversal of 121635528685 is 586825536121.

It is a de Polignac number, because none of the positive numbers 2^k-121635528685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130192 + ... + 510118.

It is an arithmetic number, because the mean of its divisors is an integer number (9953733672).

Almost surely, 2^121635528685 is an apocalyptic number.

It is an amenable number.

121635528685 is a deficient number, since it is larger than the sum of its proper divisors (37624210067).

121635528685 is a wasteful number, since it uses less digits than its factorization.

121635528685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385764.

The product of its digits is 3456000, while the sum is 52.

The spelling of 121635528685 in words is "one hundred twenty-one billion, six hundred thirty-five million, five hundred twenty-eight thousand, six hundred eighty-five".