22121431204 has 6 divisors (see below), whose sum is σ = 38712504614. Its totient is φ = 11060715600.

The previous prime is 22121431183. The next prime is 22121431247. The reversal of 22121431204 is 40213412122.

It can be written as a sum of positive squares in only one way, i.e., 21815880804 + 305550400 = 147702^2 + 17480^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765178897 + ... + 2765178904.

Almost surely, 2^22121431204 is an apocalyptic number.

It is an amenable number.

22121431204 is a deficient number, since it is larger than the sum of its proper divisors (16591073410).

22121431204 is a wasteful number, since it uses less digits than its factorization.

22121431204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530357805 (or 5530357803 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 22121431204 its reverse (40213412122), we get a palindrome (62334843326).

The spelling of 22121431204 in words is "twenty-two billion, one hundred twenty-one million, four hundred thirty-one thousand, two hundred four".