1311202131031 has 16 divisors (see below), whose sum is σ = 1427346479104. Its totient is φ = 1197266953824.

The previous prime is 1311202131011. The next prime is 1311202131053. The reversal of 1311202131031 is 1301312021131.

It is not a de Polignac number, because 1311202131031 - 2³⁹ = 761446317143 is a prime.

It is a super-2 number, since 2×1311202131031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311202131011) 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, 674650 + ... + 1754296.

It is an arithmetic number, because the mean of its divisors is an integer number (89209154944).

Almost surely, 2^{1311202131031} is an apocalyptic number.

1311202131031 is a deficient number, since it is larger than the sum of its proper divisors (116144348073).

1311202131031 is a wasteful number, since it uses less digits than its factorization.

1311202131031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080670.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1311202131031 its reverse (1301312021131), we get a palindrome (2612514152162).

The spelling of 1311202131031 in words is "one trillion, three hundred eleven billion, two hundred two million, one hundred thirty-one thousand, thirty-one".