22231221204 has 24 divisors (see below), whose sum is σ = 51875449920. Its totient is φ = 7410035584.

The previous prime is 22231221203. The next prime is 22231221209. The reversal of 22231221204 is 40212213222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231221203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316177 + ... + 380039.

It is an arithmetic number, because the mean of its divisors is an integer number (2161477080).

Almost surely, 2^22231221204 is an apocalyptic number.

It is an amenable number.

22231221204 is an abundant number, since it is smaller than the sum of its proper divisors (29644228716).

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

22231221204 is a wasteful number, since it uses less digits than its factorization.

22231221204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92879 (or 92877 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22231221204 its reverse (40212213222), we get a palindrome (62443434426).

The spelling of 22231221204 in words is "twenty-two billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred four".