21313132011 has 12 divisors (see below), whose sum is σ = 30786905760. Its totient is φ = 14208168240.

The previous prime is 21313132007. The next prime is 21313132031. The reversal of 21313132011 is 11023131312.

21313132011 is a `hidden beast` number, since 21 + 313 + 1 + 320 + 11 = 666.

It is not a de Polignac number, because 21313132011 - 2² = 21313132007 is a prime.

It is a super-2 number, since 2×21313132011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21313132031) 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, 372750 + ... + 426108.

It is an arithmetic number, because the mean of its divisors is an integer number (2565575480).

Almost surely, 2^21313132011 is an apocalyptic number.

21313132011 is a deficient number, since it is larger than the sum of its proper divisors (9473773749).

21313132011 is a wasteful number, since it uses less digits than its factorization.

21313132011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97746 (or 97743 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21313132011 its reverse (11023131312), we get a palindrome (32336263323).

The spelling of 21313132011 in words is "twenty-one billion, three hundred thirteen million, one hundred thirty-two thousand, eleven".