122015993974987 has 16 divisors (see below), whose sum is σ = 145119166940160. Its totient is φ = 100374090411168.

The previous prime is 122015993974943. The next prime is 122015993975047. The reversal of 122015993974987 is 789479399510221.

It is not a de Polignac number, because 122015993974987 - 2²³ = 122015985586379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122015993174987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1799558943 + ... + 1799626744.

It is an arithmetic number, because the mean of its divisors is an integer number (9069947933760).

Almost surely, 2^{122015993974987} is an apocalyptic number.

122015993974987 is a deficient number, since it is larger than the sum of its proper divisors (23103172965173).

122015993974987 is a wasteful number, since it uses less digits than its factorization.

122015993974987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599185890.

The product of its (nonzero) digits is 617258880, while the sum is 76.

The spelling of 122015993974987 in words is "one hundred twenty-two trillion, fifteen billion, nine hundred ninety-three million, nine hundred seventy-four thousand, nine hundred eighty-seven".