1231023202131 has 16 divisors (see below), whose sum is σ = 1732537907840. Its totient is φ = 777488325192.

The previous prime is 1231023202117. The next prime is 1231023202133. The reversal of 1231023202131 is 1312023201321.

It is not a de Polignac number, because 1231023202131 - 2²⁶ = 1230956093267 is a prime.

It is a super-2 number, since 2×1231023202131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231023202098 and 1231023202107.

It is not an unprimeable number, because it can be changed into a prime (1231023202133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29892025 + ... + 29933178.

It is an arithmetic number, because the mean of its divisors is an integer number (108283619240).

Almost surely, 2^{1231023202131} is an apocalyptic number.

1231023202131 is a deficient number, since it is larger than the sum of its proper divisors (501514705709).

1231023202131 is an frugal number, since it uses more digits than its factorization.

1231023202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59825263 (or 59825225 counting only the distinct ones).

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

Adding to 1231023202131 its reverse (1312023201321), we get a palindrome (2543046403452).

It can be divided in two parts, 123102 and 3202131, that added together give a palindrome (3325233).

The spelling of 1231023202131 in words is "one trillion, two hundred thirty-one billion, twenty-three million, two hundred two thousand, one hundred thirty-one".