979021121021 has 16 divisors (see below), whose sum is σ = 1011297222144. Its totient is φ = 947179792944.

The previous prime is 979021121011. The next prime is 979021121059. The reversal of 979021121021 is 120121120979.

It is a cyclic number.

It is not a de Polignac number, because 979021121021 - 2²² = 979016926717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979021121011) 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, 48884816 + ... + 48904838.

It is an arithmetic number, because the mean of its divisors is an integer number (63206076384).

Almost surely, 2^979021121021 is an apocalyptic number.

It is an amenable number.

979021121021 is a deficient number, since it is larger than the sum of its proper divisors (32276101123).

979021121021 is a wasteful number, since it uses less digits than its factorization.

979021121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30800.

The product of its (nonzero) digits is 4536, while the sum is 35.

The spelling of 979021121021 in words is "nine hundred seventy-nine billion, twenty-one million, one hundred twenty-one thousand, twenty-one".