21120214204 has 12 divisors (see below), whose sum is σ = 37053476824. Its totient is φ = 10533506544.

The previous prime is 21120214189. The next prime is 21120214207. The reversal of 21120214204 is 40241202112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120214207) 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, 6648354 + ... + 6651529.

Almost surely, 2^21120214204 is an apocalyptic number.

It is an amenable number.

21120214204 is a deficient number, since it is larger than the sum of its proper divisors (15933262620).

21120214204 is a wasteful number, since it uses less digits than its factorization.

21120214204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13300284 (or 13300282 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21120214204 its reverse (40241202112), we get a palindrome (61361416316).

The spelling of 21120214204 in words is "twenty-one billion, one hundred twenty million, two hundred fourteen thousand, two hundred four".