1131311330031 has 4 divisors (see below), whose sum is σ = 1508415106712. Its totient is φ = 754207553352.

The previous prime is 1131311330003. The next prime is 1131311330033. The reversal of 1131311330031 is 1300331131311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1131311330031 - 2¹⁴ = 1131311313647 is a prime.

It is a super-2 number, since 2×1131311330031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131311330033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188551888336 + ... + 188551888341.

It is an arithmetic number, because the mean of its divisors is an integer number (377103776678).

Almost surely, 2^{1131311330031} is an apocalyptic number.

1131311330031 is a deficient number, since it is larger than the sum of its proper divisors (377103776681).

1131311330031 is an equidigital number, since it uses as much as digits as its factorization.

1131311330031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377103776680.

The product of its (nonzero) digits is 243, while the sum is 21.

Adding to 1131311330031 its reverse (1300331131311), we get a palindrome (2431642461342).

The spelling of 1131311330031 in words is "one trillion, one hundred thirty-one billion, three hundred eleven million, three hundred thirty thousand, thirty-one".