21310032211 has 16 divisors (see below), whose sum is σ = 23123800000. Its totient is φ = 19521710208.

The previous prime is 21310032199. The next prime is 21310032223. The reversal of 21310032211 is 11223001312.

It is an interprime number because it is at equal distance from previous prime (21310032199) and next prime (21310032223).

It is a de Polignac number, because none of the positive numbers 2^k-21310032211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21310032311) 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, 1016665 + ... + 1037413.

It is an arithmetic number, because the mean of its divisors is an integer number (1445237500).

Almost surely, 2^21310032211 is an apocalyptic number.

21310032211 is a deficient number, since it is larger than the sum of its proper divisors (1813767789).

21310032211 is a wasteful number, since it uses less digits than its factorization.

21310032211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21358.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21310032211 its reverse (11223001312), we get a palindrome (32533033523).

The spelling of 21310032211 in words is "twenty-one billion, three hundred ten million, thirty-two thousand, two hundred eleven".