131011331220123 has 4 divisors (see below), whose sum is σ = 174681774960168. Its totient is φ = 87340887480080.

The previous prime is 131011331220113. The next prime is 131011331220137. The reversal of 131011331220123 is 321022133110131.

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 131011331220123 - 2¹⁸ = 131011330957979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131011331220093 and 131011331220102.

It is not an unprimeable number, because it can be changed into a prime (131011331220113) 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, 21835221870018 + ... + 21835221870023.

It is an arithmetic number, because the mean of its divisors is an integer number (43670443740042).

Almost surely, 2^{131011331220123} is an apocalyptic number.

131011331220123 is a deficient number, since it is larger than the sum of its proper divisors (43670443740045).

131011331220123 is an equidigital number, since it uses as much as digits as its factorization.

131011331220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43670443740044.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 131011331220123 its reverse (321022133110131), we get a palindrome (452033464330254).

The spelling of 131011331220123 in words is "one hundred thirty-one trillion, eleven billion, three hundred thirty-one million, two hundred twenty thousand, one hundred twenty-three".