979199042121 has 24 divisors (see below), whose sum is σ = 1461621285696. Its totient is φ = 631304906400.

The previous prime is 979199042113. The next prime is 979199042161. The reversal of 979199042121 is 121240991979.

979199042121 is a `hidden beast` number, since 9 + 7 + 9 + 199 + 0 + 421 + 21 = 666.

It is not a de Polignac number, because 979199042121 - 2³ = 979199042113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (979199042161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12486805 + ... + 12564978.

It is an arithmetic number, because the mean of its divisors is an integer number (60900886904).

Almost surely, 2^979199042121 is an apocalyptic number.

It is an amenable number.

979199042121 is a deficient number, since it is larger than the sum of its proper divisors (482422243575).

979199042121 is a wasteful number, since it uses less digits than its factorization.

979199042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25051933 (or 25051930 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The spelling of 979199042121 in words is "nine hundred seventy-nine billion, one hundred ninety-nine million, forty-two thousand, one hundred twenty-one".