22451221004 has 12 divisors (see below), whose sum is σ = 39293551584. Its totient is φ = 11224491984.

The previous prime is 22451220973. The next prime is 22451221007. The reversal of 22451221004 is 40012215422.

It is not an unprimeable number, because it can be changed into a prime (22451221007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233627 + ... + 315410.

It is an arithmetic number, because the mean of its divisors is an integer number (3274462632).

Almost surely, 2^22451221004 is an apocalyptic number.

It is an amenable number.

22451221004 is a deficient number, since it is larger than the sum of its proper divisors (16842330580).

22451221004 is a wasteful number, since it uses less digits than its factorization.

22451221004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559264 (or 559262 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 22451221004 its reverse (40012215422), we get a palindrome (62463436426).

The spelling of 22451221004 in words is "twenty-two billion, four hundred fifty-one million, two hundred twenty-one thousand, four".