131013021023 has 4 divisors (see below), whose sum is σ = 133160775528. Its totient is φ = 128865266520.

The previous prime is 131013021019. The next prime is 131013021031. The reversal of 131013021023 is 320120310131.

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 131013021023 - 2² = 131013021019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131013020992 and 131013021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131013021523) 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, 1073877161 + ... + 1073877282.

It is an arithmetic number, because the mean of its divisors is an integer number (33290193882).

Almost surely, 2^131013021023 is an apocalyptic number.

131013021023 is a deficient number, since it is larger than the sum of its proper divisors (2147754505).

131013021023 is an equidigital number, since it uses as much as digits as its factorization.

131013021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147754504.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 131013021023 its reverse (320120310131), we get a palindrome (451133331154).

The spelling of 131013021023 in words is "one hundred thirty-one billion, thirteen million, twenty-one thousand, twenty-three".