1231313303131 has 2 divisors, whose sum is σ = 1231313303132. Its totient is φ = 1231313303130.

The previous prime is 1231313303089. The next prime is 1231313303147. The reversal of 1231313303131 is 1313033131321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231313303131 - 2⁹ = 1231313302619 is a prime.

It is a super-2 number, since 2×1231313303131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231313303096 and 1231313303105.

It is not a weakly prime, because it can be changed into another prime (1231313103131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615656651565 + 615656651566.

It is an arithmetic number, because the mean of its divisors is an integer number (615656651566).

Almost surely, 2^{1231313303131} is an apocalyptic number.

1231313303131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231313303131 is an equidigital number, since it uses as much as digits as its factorization.

1231313303131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 1231313303131 its reverse (1313033131321), we get a palindrome (2544346434452).

The spelling of 1231313303131 in words is "one trillion, two hundred thirty-one billion, three hundred thirteen million, three hundred three thousand, one hundred thirty-one".