131023131123 has 32 divisors (see below), whose sum is σ = 181397905920. Its totient is φ = 84060103680.

The previous prime is 131023131089. The next prime is 131023131137. The reversal of 131023131123 is 321131320131.

It is a happy number.

It is not a de Polignac number, because 131023131123 - 2¹⁷ = 131023000051 is a prime.

It is a super-2 number, since 2×131023131123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131023131123.

It is not an unprimeable number, because it can be changed into a prime (131023131223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17297565 + ... + 17305137.

It is an arithmetic number, because the mean of its divisors is an integer number (5668684560).

Almost surely, 2^131023131123 is an apocalyptic number.

131023131123 is a deficient number, since it is larger than the sum of its proper divisors (50374774797).

131023131123 is a wasteful number, since it uses less digits than its factorization.

131023131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 131023131123 its reverse (321131320131), we get a palindrome (452154451254).

The spelling of 131023131123 in words is "one hundred thirty-one billion, twenty-three million, one hundred thirty-one thousand, one hundred twenty-three".