121955026938 has 32 divisors (see below), whose sum is σ = 260543195136. Its totient is φ = 37921809408.

The previous prime is 121955026873. The next prime is 121955026969. The reversal of 121955026938 is 839620559121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5278906 + ... + 5301957.

It is an arithmetic number, because the mean of its divisors is an integer number (8141974848).

Almost surely, 2^121955026938 is an apocalyptic number.

121955026938 is an abundant number, since it is smaller than the sum of its proper divisors (138588168198).

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

121955026938 is a wasteful number, since it uses less digits than its factorization.

121955026938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10580998.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 121955026938 in words is "one hundred twenty-one billion, nine hundred fifty-five million, twenty-six thousand, nine hundred thirty-eight".