23131111421413 has 4 divisors (see below), whose sum is σ = 23133099837708. Its totient is φ = 23129123005120.

The previous prime is 23131111421321. The next prime is 23131111421443. The reversal of 23131111421413 is 31412411113132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8314324270849 + 14816787150564 = 2883457^2 + 3849258^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131111421413 - 2³³ = 23122521486821 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 (23131111421443) 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, 994190698 + ... + 994213963.

It is an arithmetic number, because the mean of its divisors is an integer number (5783274959427).

Almost surely, 2^{23131111421413} is an apocalyptic number.

It is an amenable number.

23131111421413 is a deficient number, since it is larger than the sum of its proper divisors (1988416295).

23131111421413 is a wasteful number, since it uses less digits than its factorization.

23131111421413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988416294.

The product of its digits is 1728, while the sum is 28.

Adding to 23131111421413 its reverse (31412411113132), we get a palindrome (54543522534545).

The spelling of 23131111421413 in words is "twenty-three trillion, one hundred thirty-one billion, one hundred eleven million, four hundred twenty-one thousand, four hundred thirteen".