21313001211 has 4 divisors (see below), whose sum is σ = 28417334952. Its totient is φ = 14208667472.

The previous prime is 21313001191. The next prime is 21313001251. The reversal of 21313001211 is 11210031312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21313001211 - 2⁵ = 21313001179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21313001251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3552166866 + ... + 3552166871.

It is an arithmetic number, because the mean of its divisors is an integer number (7104333738).

Almost surely, 2^21313001211 is an apocalyptic number.

21313001211 is a deficient number, since it is larger than the sum of its proper divisors (7104333741).

21313001211 is an equidigital number, since it uses as much as digits as its factorization.

21313001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104333740.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21313001211 its reverse (11210031312), we get a palindrome (32523032523).

The spelling of 21313001211 in words is "twenty-one billion, three hundred thirteen million, one thousand, two hundred eleven".