21223130404 has 24 divisors (see below), whose sum is σ = 42866526528. Its totient is φ = 9005570400.

The previous prime is 21223130393. The next prime is 21223130443. The reversal of 21223130404 is 40403132212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3749494 + ... + 3755149.

It is an arithmetic number, because the mean of its divisors is an integer number (1786105272).

Almost surely, 2^21223130404 is an apocalyptic number.

It is an amenable number.

21223130404 is an abundant number, since it is smaller than the sum of its proper divisors (21643396124).

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

21223130404 is a wasteful number, since it uses less digits than its factorization.

21223130404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7504755 (or 7504753 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21223130404 its reverse (40403132212), we get a palindrome (61626262616).

The spelling of 21223130404 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirty thousand, four hundred four".