979991120212 has 48 divisors (see below), whose sum is σ = 1864449498240. Its totient is φ = 448008596352.

The previous prime is 979991120201. The next prime is 979991120219. The reversal of 979991120212 is 212021199979.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 979991120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979991120219) 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, 66799614 + ... + 66814282.

It is an arithmetic number, because the mean of its divisors is an integer number (38842697880).

Almost surely, 2^979991120212 is an apocalyptic number.

It is an amenable number.

979991120212 is a deficient number, since it is larger than the sum of its proper divisors (884458378028).

979991120212 is a wasteful number, since it uses less digits than its factorization.

979991120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26800 (or 26798 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 52.

The spelling of 979991120212 in words is "nine hundred seventy-nine billion, nine hundred ninety-one million, one hundred twenty thousand, two hundred twelve".