21220422232 has 32 divisors (see below), whose sum is σ = 42038190000. Its totient is φ = 10014392448.

The previous prime is 21220422229. The next prime is 21220422263. The reversal of 21220422232 is 23222402212.

It is a congruent number.

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, 218607 + ... + 300382.

Almost surely, 2^21220422232 is an apocalyptic number.

It is an amenable number.

21220422232 is a deficient number, since it is larger than the sum of its proper divisors (20817767768).

21220422232 is a wasteful number, since it uses less digits than its factorization.

21220422232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519283 (or 519279 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21220422232 its reverse (23222402212), we get a palindrome (44442824444).

The spelling of 21220422232 in words is "twenty-one billion, two hundred twenty million, four hundred twenty-two thousand, two hundred thirty-two".