22113111204 has 72 divisors (see below), whose sum is σ = 57971255160. Its totient is φ = 7098803712.

The previous prime is 22113111197. The next prime is 22113111271. The reversal of 22113111204 is 40211131122.

It can be written as a sum of positive squares in 4 ways, for example, as 9692008704 + 12421102500 = 98448^2 + 111450^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387792 + ... + 441144.

Almost surely, 2^22113111204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22113111204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28985627580).

22113111204 is an abundant number, since it is smaller than the sum of its proper divisors (35858143956).

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

22113111204 is a wasteful number, since it uses less digits than its factorization.

22113111204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53789 (or 53784 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 22113111204 its reverse (40211131122), we get a palindrome (62324242326).

The spelling of 22113111204 in words is "twenty-two billion, one hundred thirteen million, one hundred eleven thousand, two hundred four".