22123031100 has 144 divisors (see below), whose sum is σ = 65113082496. Its totient is φ = 5798624000.

The previous prime is 22123031059. The next prime is 22123031129. The reversal of 22123031100 is 113032122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22123031100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4202470 + ... + 4207730.

It is an arithmetic number, because the mean of its divisors is an integer number (452174184).

Almost surely, 2^22123031100 is an apocalyptic number.

22123031100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22123031100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32556541248).

22123031100 is an abundant number, since it is smaller than the sum of its proper divisors (42990051396).

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

22123031100 is a wasteful number, since it uses less digits than its factorization.

22123031100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516 (or 5509 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 22123031100 its reverse (113032122), we get a palindrome (22236063222).

The spelling of 22123031100 in words is "twenty-two billion, one hundred twenty-three million, thirty-one thousand, one hundred".