90122220212 has 24 divisors (see below), whose sum is σ = 170063759040. Its totient is φ = 41648264640.

The previous prime is 90122220179. The next prime is 90122220233. The reversal of 90122220212 is 21202222109.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 14458088 + ... + 14464319.

It is an arithmetic number, because the mean of its divisors is an integer number (7085989960).

Almost surely, 2^90122220212 is an apocalyptic number.

It is an amenable number.

90122220212 is a deficient number, since it is larger than the sum of its proper divisors (79941538828).

90122220212 is a wasteful number, since it uses less digits than its factorization.

90122220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28922471 (or 28922469 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 90122220212 in words is "ninety billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twelve".