1231213302031 has 2 divisors, whose sum is σ = 1231213302032. Its totient is φ = 1231213302030.

The previous prime is 1231213301933. The next prime is 1231213302043. The reversal of 1231213302031 is 1302033121321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231213302031 - 2⁹ = 1231213301519 is a prime.

It is a super-2 number, since 2×1231213302031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231213301993 and 1231213302011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231213302091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615606651015 + 615606651016.

It is an arithmetic number, because the mean of its divisors is an integer number (615606651016).

Almost surely, 2^{1231213302031} is an apocalyptic number.

1231213302031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231213302031 is an equidigital number, since it uses as much as digits as its factorization.

1231213302031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1231213302031 its reverse (1302033121321), we get a palindrome (2533246423352).

The spelling of 1231213302031 in words is "one trillion, two hundred thirty-one billion, two hundred thirteen million, three hundred two thousand, thirty-one".