22211121204 has 72 divisors (see below), whose sum is σ = 56987854560. Its totient is φ = 7293312192.

The previous prime is 22211121193. The next prime is 22211121241. The reversal of 22211121204 is 40212111222.

It is a super-4 number, since 4×22211121204⁴ (a number of 42 digits) contains 4444 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 673402 + ... + 705614.

It is an arithmetic number, because the mean of its divisors is an integer number (791497980).

Almost surely, 2^22211121204 is an apocalyptic number.

It is an amenable number.

22211121204 is an abundant number, since it is smaller than the sum of its proper divisors (34776733356).

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

22211121204 is a wasteful number, since it uses less digits than its factorization.

22211121204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32509 (or 32504 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22211121204 its reverse (40212111222), we get a palindrome (62423232426).

The spelling of 22211121204 in words is "twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred four".