21214422204 has 12 divisors (see below), whose sum is σ = 49500318504. Its totient is φ = 7071474064.

The previous prime is 21214422197. The next prime is 21214422221. The reversal of 21214422204 is 40222441212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 883934247 + ... + 883934270.

It is an arithmetic number, because the mean of its divisors is an integer number (4125026542).

Almost surely, 2^21214422204 is an apocalyptic number.

It is an amenable number.

21214422204 is an abundant number, since it is smaller than the sum of its proper divisors (28285896300).

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

21214422204 is a wasteful number, since it uses less digits than its factorization.

21214422204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767868524 (or 1767868522 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21214422204 its reverse (40222441212), we get a palindrome (61436863416).

The spelling of 21214422204 in words is "twenty-one billion, two hundred fourteen million, four hundred twenty-two thousand, two hundred four".