131123400123 has 32 divisors (see below), whose sum is σ = 180268303360. Its totient is φ = 84716409600.

The previous prime is 131123400073. The next prime is 131123400127. The reversal of 131123400123 is 321004321131.

It is not a de Polignac number, because 131123400123 - 2⁸ = 131123399867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131123400123.

It is not an unprimeable number, because it can be changed into a prime (131123400127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45990648 + ... + 45993498.

It is an arithmetic number, because the mean of its divisors is an integer number (5633384480).

Almost surely, 2^131123400123 is an apocalyptic number.

131123400123 is a deficient number, since it is larger than the sum of its proper divisors (49144903237).

131123400123 is a wasteful number, since it uses less digits than its factorization.

131123400123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131123400123 its reverse (321004321131), we get a palindrome (452127721254).

The spelling of 131123400123 in words is "one hundred thirty-one billion, one hundred twenty-three million, four hundred thousand, one hundred twenty-three".