113121331213 has 4 divisors (see below), whose sum is σ = 123405088608. Its totient is φ = 102837573820.

The previous prime is 113121331199. The next prime is 113121331229. The reversal of 113121331213 is 312133121311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312133121311 = 11 ⋅28375738301.

It is a cyclic number.

It is not a de Polignac number, because 113121331213 - 2⁹ = 113121330701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121331243) 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, 5141878681 + ... + 5141878702.

It is an arithmetic number, because the mean of its divisors is an integer number (30851272152).

Almost surely, 2^113121331213 is an apocalyptic number.

It is an amenable number.

113121331213 is a deficient number, since it is larger than the sum of its proper divisors (10283757395).

113121331213 is a wasteful number, since it uses less digits than its factorization.

113121331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10283757394.

The product of its digits is 324, while the sum is 22.

Adding to 113121331213 its reverse (312133121311), we get a palindrome (425254452524).

It can be divided in two parts, 11 and 3121331213, that multiplied together give a palindrome (34334643343).

The spelling of 113121331213 in words is "one hundred thirteen billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred thirteen".