87992121022 has 24 divisors (see below), whose sum is σ = 142983250920. Its totient is φ = 40594376160.

The previous prime is 87992120987. The next prime is 87992121029. The reversal of 87992121022 is 22012129978.

It is a happy number.

It is a super-2 number, since 2×87992121022² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87992121022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87992121029) 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 11 ways as a sum of consecutive naturals, for example, 752997 + ... + 861967.

It is an arithmetic number, because the mean of its divisors is an integer number (5957635455).

Almost surely, 2^87992121022 is an apocalyptic number.

87992121022 is a deficient number, since it is larger than the sum of its proper divisors (54991129898).

87992121022 is a wasteful number, since it uses less digits than its factorization.

87992121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111388 (or 111375 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 87992121022 in words is "eighty-seven billion, nine hundred ninety-two million, one hundred twenty-one thousand, twenty-two".