21113222320 has 40 divisors (see below), whose sum is σ = 49096929024. Its totient is φ = 8443794432.

The previous prime is 21113222309. The next prime is 21113222387. The reversal of 21113222320 is 2322231112.

It is a tau number, because it is divible by the number of its divisors (40).

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, 506097 + ... + 546223.

Almost surely, 2^21113222320 is an apocalyptic number.

21113222320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113222320 is an abundant number, since it is smaller than the sum of its proper divisors (27983706704).

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

21113222320 is a wasteful number, since it uses less digits than its factorization.

21113222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46717 (or 46711 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21113222320 its reverse (2322231112), we get a palindrome (23435453432).

The spelling of 21113222320 in words is "twenty-one billion, one hundred thirteen million, two hundred twenty-two thousand, three hundred twenty".