99990121011012 has 72 divisors (see below), whose sum is σ = 270026564152800. Its totient is φ = 31104546663168.

The previous prime is 99990121010977. The next prime is 99990121011049. The reversal of 99990121011012 is 21011012109999.

It is an unprimeable number.

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, 1090882437 + ... + 1090974092.

Almost surely, 2^{99990121011012} is an apocalyptic number.

It is an amenable number.

99990121011012 is an abundant number, since it is smaller than the sum of its proper divisors (170036443141788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99990121011012 is a wasteful number, since it uses less digits than its factorization.

99990121011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181856625 (or 2181856620 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 45.

The spelling of 99990121011012 in words is "ninety-nine trillion, nine hundred ninety billion, one hundred twenty-one million, eleven thousand, twelve".