1231131300031 has 2 divisors, whose sum is σ = 1231131300032. Its totient is φ = 1231131300030.

The previous prime is 1231131300011. The next prime is 1231131300037. The reversal of 1231131300031 is 1300031311321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231131300031 - 2¹¹ = 1231131297983 is a prime.

It is a super-2 number, since 2×1231131300031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231131299981 and 1231131300008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231131300037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615565650015 + 615565650016.

It is an arithmetic number, because the mean of its divisors is an integer number (615565650016).

Almost surely, 2^{1231131300031} is an apocalyptic number.

1231131300031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231131300031 is an equidigital number, since it uses as much as digits as its factorization.

1231131300031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 1231131300031 its reverse (1300031311321), we get a palindrome (2531162611352).

The spelling of 1231131300031 in words is "one trillion, two hundred thirty-one billion, one hundred thirty-one million, three hundred thousand, thirty-one".