131213011103431 has 2 divisors, whose sum is σ = 131213011103432. Its totient is φ = 131213011103430.

The previous prime is 131213011103429. The next prime is 131213011103453. The reversal of 131213011103431 is 134301110312131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131213011103431 - 2¹ = 131213011103429 is a prime.

It is a super-2 number, since 2×131213011103431² (a number of 29 digits) contains 22 as substring.

Together with 131213011103429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 131213011103396 and 131213011103405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131213011103401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65606505551715 + 65606505551716.

It is an arithmetic number, because the mean of its divisors is an integer number (65606505551716).

Almost surely, 2^{131213011103431} is an apocalyptic number.

131213011103431 is a deficient number, since it is larger than the sum of its proper divisors (1).

131213011103431 is an equidigital number, since it uses as much as digits as its factorization.

131213011103431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 131213011103431 its reverse (134301110312131), we get a palindrome (265514121415562).

The spelling of 131213011103431 in words is "one hundred thirty-one trillion, two hundred thirteen billion, eleven million, one hundred three thousand, four hundred thirty-one".