21313001311 has 32 divisors (see below), whose sum is σ = 25233610752. Its totient is φ = 17624079360.

The previous prime is 21313001279. The next prime is 21313001321. The reversal of 21313001311 is 11310031312.

It is a cyclic number.

It is not a de Polignac number, because 21313001311 - 2⁵ = 21313001279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313001321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8838696 + ... + 8841106.

It is an arithmetic number, because the mean of its divisors is an integer number (788550336).

Almost surely, 2^21313001311 is an apocalyptic number.

21313001311 is a deficient number, since it is larger than the sum of its proper divisors (3920609441).

21313001311 is a wasteful number, since it uses less digits than its factorization.

21313001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21313001311 its reverse (11310031312), we get a palindrome (32623032623).

The spelling of 21313001311 in words is "twenty-one billion, three hundred thirteen million, one thousand, three hundred eleven".