131313131123 has 4 divisors (see below), whose sum is σ = 131691555480. Its totient is φ = 130934706768.

The previous prime is 131313131101. The next prime is 131313131149. The reversal of 131313131123 is 321131313131.

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

It is a cyclic number.

It is not a de Polignac number, because 131313131123 - 2²⁰ = 131312082547 is a prime.

It is a super-2 number, since 2×131313131123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131313131023) 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, 189211658 + ... + 189212351.

It is an arithmetic number, because the mean of its divisors is an integer number (32922888870).

Almost surely, 2^131313131123 is an apocalyptic number.

131313131123 is a deficient number, since it is larger than the sum of its proper divisors (378424357).

131313131123 is an equidigital number, since it uses as much as digits as its factorization.

131313131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378424356.

The product of its digits is 486, while the sum is 23.

Adding to 131313131123 its reverse (321131313131), we get a palindrome (452444444254).

The spelling of 131313131123 in words is "one hundred thirty-one billion, three hundred thirteen million, one hundred thirty-one thousand, one hundred twenty-three".