21113001320 has 32 divisors (see below), whose sum is σ = 48309415200. Its totient is φ = 8302060608.

The previous prime is 21113001307. The next prime is 21113001337. The reversal of 21113001320 is 2310031112.

It is a junction number, because it is equal to n+sod(n) for n = 21113001295 and 21113001304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4470734 + ... + 4475453.

It is an arithmetic number, because the mean of its divisors is an integer number (1509669225).

Almost surely, 2^21113001320 is an apocalyptic number.

21113001320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113001320 is an abundant number, since it is smaller than the sum of its proper divisors (27196413880).

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

21113001320 is a wasteful number, since it uses less digits than its factorization.

21113001320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8946257 (or 8946253 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21113001320 its reverse (2310031112), we get a palindrome (23423032432).

The spelling of 21113001320 in words is "twenty-one billion, one hundred thirteen million, one thousand, three hundred twenty".