21411421204 has 12 divisors (see below), whose sum is σ = 38341382464. Its totient is φ = 10456740504.

The previous prime is 21411421193. The next prime is 21411421219. The reversal of 21411421204 is 40212411412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62242332 + ... + 62242675.

Almost surely, 2^21411421204 is an apocalyptic number.

It is an amenable number.

21411421204 is a deficient number, since it is larger than the sum of its proper divisors (16929961260).

21411421204 is a wasteful number, since it uses less digits than its factorization.

21411421204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124485054 (or 124485052 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21411421204 its reverse (40212411412), we get a palindrome (61623832616).

The spelling of 21411421204 in words is "twenty-one billion, four hundred eleven million, four hundred twenty-one thousand, two hundred four".