21320789211 has 12 divisors (see below), whose sum is σ = 31451944992. Its totient is φ = 13911436656.

The previous prime is 21320789137. The next prime is 21320789213. The reversal of 21320789211 is 11298702312.

It is not a de Polignac number, because 21320789211 - 2²² = 21316594907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21320789213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25201456 + ... + 25202301.

It is an arithmetic number, because the mean of its divisors is an integer number (2620995416).

Almost surely, 2^21320789211 is an apocalyptic number.

21320789211 is a deficient number, since it is larger than the sum of its proper divisors (10131155781).

21320789211 is a wasteful number, since it uses less digits than its factorization.

21320789211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50403810 (or 50403807 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 21320789211 in words is "twenty-one billion, three hundred twenty million, seven hundred eighty-nine thousand, two hundred eleven".