121953384836 has 48 divisors (see below), whose sum is σ = 226725768192. Its totient is φ = 57295900800.

The previous prime is 121953384821. The next prime is 121953384877. The reversal of 121953384836 is 638483359121.

It is a happy 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, 2207066 + ... + 2261646.

It is an arithmetic number, because the mean of its divisors is an integer number (4723453504).

Almost surely, 2^121953384836 is an apocalyptic number.

It is an amenable number.

121953384836 is a deficient number, since it is larger than the sum of its proper divisors (104772383356).

121953384836 is a wasteful number, since it uses less digits than its factorization.

121953384836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55140 (or 55138 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The spelling of 121953384836 in words is "one hundred twenty-one billion, nine hundred fifty-three million, three hundred eighty-four thousand, eight hundred thirty-six".