2131031100023 has 4 divisors (see below), whose sum is σ = 2435464114320. Its totient is φ = 1826598085728.

The previous prime is 2131031100019. The next prime is 2131031100053. The reversal of 2131031100023 is 3200011301312.

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 2131031100023 - 2² = 2131031100019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131031099974 and 2131031100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131031100053) 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, 152216507138 + ... + 152216507151.

It is an arithmetic number, because the mean of its divisors is an integer number (608866028580).

Almost surely, 2^{2131031100023} is an apocalyptic number.

2131031100023 is a deficient number, since it is larger than the sum of its proper divisors (304433014297).

2131031100023 is an equidigital number, since it uses as much as digits as its factorization.

2131031100023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304433014296.

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

Adding to 2131031100023 its reverse (3200011301312), we get a palindrome (5331042401335).

The spelling of 2131031100023 in words is "two trillion, one hundred thirty-one billion, thirty-one million, one hundred thousand, twenty-three".