22121101008 has 60 divisors (see below), whose sum is σ = 61970855908. Its totient is φ = 7366256640.

The previous prime is 22121101007. The next prime is 22121101019. The reversal of 22121101008 is 80010112122.

It can be written as a sum of positive squares in 2 ways, for example, as 17199797904 + 4921303104 = 131148^2 + 70152^2 .

It is a super-2 number, since 2×22121101008² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121101007) 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, 66528 + ... + 220608.

Almost surely, 2^22121101008 is an apocalyptic number.

It is an amenable number.

22121101008 is an abundant number, since it is smaller than the sum of its proper divisors (39849754900).

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

22121101008 is a wasteful number, since it uses less digits than its factorization.

22121101008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155092 (or 155083 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The spelling of 22121101008 in words is "twenty-two billion, one hundred twenty-one million, one hundred one thousand, eight".