90921121110 has 32 divisors (see below), whose sum is σ = 242456323680. Its totient is φ = 24245632224.

The previous prime is 90921121099. The next prime is 90921121169. The reversal of 90921121110 is 1112112909.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168372177 + ... + 168372716.

It is an arithmetic number, because the mean of its divisors is an integer number (7576760115).

Almost surely, 2^90921121110 is an apocalyptic number.

90921121110 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

90921121110 is an abundant number, since it is smaller than the sum of its proper divisors (151535202570).

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

90921121110 is a wasteful number, since it uses less digits than its factorization.

90921121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336744909 (or 336744903 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 90921121110 in words is "ninety billion, nine hundred twenty-one million, one hundred twenty-one thousand, one hundred ten".