21320602311 has 8 divisors (see below), whose sum is σ = 28450833264. Its totient is φ = 14202053120.

The previous prime is 21320602267. The next prime is 21320602313. The reversal of 21320602311 is 11320602312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21320602311 - 2²² = 21316408007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320602313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2916180 + ... + 2923481.

It is an arithmetic number, because the mean of its divisors is an integer number (3556354158).

Almost surely, 2^21320602311 is an apocalyptic number.

21320602311 is a deficient number, since it is larger than the sum of its proper divisors (7130230953).

21320602311 is a wasteful number, since it uses less digits than its factorization.

21320602311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5840881.

The product of its (nonzero) digits is 432, while the sum is 21.

Subtracting from 21320602311 its reverse (11320602312), we obtain a palindrome (9999999999).

The spelling of 21320602311 in words is "twenty-one billion, three hundred twenty million, six hundred two thousand, three hundred eleven".