21130112332013 has 4 divisors (see below), whose sum is σ = 21133581409248. Its totient is φ = 21126643254780.

The previous prime is 21130112331989. The next prime is 21130112332051. The reversal of 21130112332013 is 31023321103112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21130112332013 - 2⁶ = 21130112331949 is a prime.

It is a super-2 number, since 2×21130112332013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21130112332013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130112332313) 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, 1734529481 + ... + 1734541662.

It is an arithmetic number, because the mean of its divisors is an integer number (5283395352312).

Almost surely, 2^{21130112332013} is an apocalyptic number.

It is an amenable number.

21130112332013 is a deficient number, since it is larger than the sum of its proper divisors (3469077235).

21130112332013 is an equidigital number, since it uses as much as digits as its factorization.

21130112332013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469077234.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21130112332013 its reverse (31023321103112), we get a palindrome (52153433435125).

The spelling of 21130112332013 in words is "twenty-one trillion, one hundred thirty billion, one hundred twelve million, three hundred thirty-two thousand, thirteen".