21222531030 has 32 divisors (see below), whose sum is σ = 50959851264. Its totient is φ = 5656477536.

The previous prime is 21222530983. The next prime is 21222531037. The reversal of 21222531030 is 3013522212.

It is a junction number, because it is equal to n+sod(n) for n = 21222530988 and 21222531006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222531037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118402 + ... + 237621.

It is an arithmetic number, because the mean of its divisors is an integer number (1592495352).

Almost surely, 2^21222531030 is an apocalyptic number.

21222531030 is an abundant number, since it is smaller than the sum of its proper divisors (29737320234).

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

21222531030 is a wasteful number, since it uses less digits than its factorization.

21222531030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358020.

The product of its (nonzero) digits is 720, while the sum is 21.

The spelling of 21222531030 in words is "twenty-one billion, two hundred twenty-two million, five hundred thirty-one thousand, thirty".