131231121111113 has 4 divisors (see below), whose sum is σ = 135756332183940. Its totient is φ = 126705910038288.

The previous prime is 131231121111091. The next prime is 131231121111119. The reversal of 131231121111113 is 311111121132131.

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 22190807546944 + 109040313564169 = 4710712^2 + 10442237^2 .

It is a cyclic number.

It is not a de Polignac number, because 131231121111113 - 2¹² = 131231121107017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131231121111119) 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, 2262605536370 + ... + 2262605536427.

It is an arithmetic number, because the mean of its divisors is an integer number (33939083045985).

Almost surely, 2^{131231121111113} is an apocalyptic number.

It is an amenable number.

131231121111113 is a deficient number, since it is larger than the sum of its proper divisors (4525211072827).

131231121111113 is an equidigital number, since it uses as much as digits as its factorization.

131231121111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525211072826.

The product of its digits is 108, while the sum is 23.

Adding to 131231121111113 its reverse (311111121132131), we get a palindrome (442342242243244).

The spelling of 131231121111113 in words is "one hundred thirty-one trillion, two hundred thirty-one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred thirteen".