21222521932 has 12 divisors (see below), whose sum is σ = 37140885936. Its totient is φ = 10610840240.

The previous prime is 21222521927. The next prime is 21222521933. The reversal of 21222521932 is 23912522212.

It is a junction number, because it is equal to n+sod(n) for n = 21222521894 and 21222521903.

It is not an unprimeable number, because it can be changed into a prime (21222521933) 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, 26682 + ... + 207742.

It is an arithmetic number, because the mean of its divisors is an integer number (3095073828).

Almost surely, 2^21222521932 is an apocalyptic number.

It is an amenable number.

21222521932 is a deficient number, since it is larger than the sum of its proper divisors (15918364004).

21222521932 is a wasteful number, since it uses less digits than its factorization.

21222521932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210368 (or 210366 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The spelling of 21222521932 in words is "twenty-one billion, two hundred twenty-two million, five hundred twenty-one thousand, nine hundred thirty-two".