131113123 has 2 divisors, whose sum is σ = 131113124. Its totient is φ = 131113122.

The previous prime is 131113111. The next prime is 131113139. The reversal of 131113123 is 321311131.

It is an a-pointer prime, because the next prime (131113139) can be obtained adding 131113123 to its sum of digits (16).

It is a weak prime.

It is an emirp because it is prime and its reverse (321311131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131113123 - 2²⁵ = 97558691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131113097 and 131113106.

It is not a weakly prime, because it can be changed into another prime (131113193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65556561 + 65556562.

It is an arithmetic number, because the mean of its divisors is an integer number (65556562).

Almost surely, 2^131113123 is an apocalyptic number.

131113123 is a deficient number, since it is larger than the sum of its proper divisors (1).

131113123 is an equidigital number, since it uses as much as digits as its factorization.

131113123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 16.

The square root of 131113123 is about 11450.4638770663. The cubic root of 131113123 is about 508.0214550118.

Adding to 131113123 its reverse (321311131), we get a palindrome (452424254).

The spelling of 131113123 in words is "one hundred thirty-one million, one hundred thirteen thousand, one hundred twenty-three".