990111220211022 has 144 divisors (see below), whose sum is σ = 2561763372183792. Its totient is φ = 254070713594880.

The previous prime is 990111220210963. The next prime is 990111220211053. The reversal of 990111220211022 is 220112022111099.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 267450379 + ... + 271127142.

It is an arithmetic number, because the mean of its divisors is an integer number (17790023417943).

Almost surely, 2^{990111220211022} is an apocalyptic number.

990111220211022 is an abundant number, since it is smaller than the sum of its proper divisors (1571652151972770).

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

990111220211022 is a wasteful number, since it uses less digits than its factorization.

990111220211022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538577603 (or 538577583 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 990111220211022 in words is "nine hundred ninety trillion, one hundred eleven billion, two hundred twenty million, two hundred eleven thousand, twenty-two".