21222113130 has 64 divisors (see below), whose sum is σ = 57274197120. Its totient is φ = 5591040768.

The previous prime is 21222113113. The next prime is 21222113141. The reversal of 21222113130 is 3131122212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451087 + ... + 495906.

It is an arithmetic number, because the mean of its divisors is an integer number (894909330).

Almost surely, 2^21222113130 is an apocalyptic number.

21222113130 is an abundant number, since it is smaller than the sum of its proper divisors (36052083990).

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

21222113130 is a wasteful number, since it uses less digits than its factorization.

21222113130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947092 (or 947086 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21222113130 its reverse (3131122212), we get a palindrome (24353235342).

The spelling of 21222113130 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirteen thousand, one hundred thirty".