202110120091 has 12 divisors (see below), whose sum is σ = 223645086000. Its totient is φ = 182503325840.

The previous prime is 202110120073. The next prime is 202110120097. The reversal of 202110120091 is 190021011202.

It is a happy number.

It is not a de Polignac number, because 202110120091 - 2⁵ = 202110120059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202110120097) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5587111 + ... + 5623168.

It is an arithmetic number, because the mean of its divisors is an integer number (18637090500).

Almost surely, 2^202110120091 is an apocalyptic number.

202110120091 is a deficient number, since it is larger than the sum of its proper divisors (21534965909).

202110120091 is a wasteful number, since it uses less digits than its factorization.

202110120091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210450 (or 11210439 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 202110120091 its reverse (190021011202), we get a palindrome (392131131293).

The spelling of 202110120091 in words is "two hundred two billion, one hundred ten million, one hundred twenty thousand, ninety-one".