1131023031331 has 4 divisors (see below), whose sum is σ = 1133497918072. Its totient is φ = 1128548144592.

The previous prime is 1131023031317. The next prime is 1131023031343. The reversal of 1131023031331 is 1331303201311.

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

It is a cyclic number.

It is not a de Polignac number, because 1131023031331 - 2²⁵ = 1130989476899 is a prime.

It is a super-2 number, since 2×1131023031331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131023031311) 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, 1237442685 + ... + 1237443598.

It is an arithmetic number, because the mean of its divisors is an integer number (283374479518).

Almost surely, 2^{1131023031331} is an apocalyptic number.

1131023031331 is a deficient number, since it is larger than the sum of its proper divisors (2474886741).

1131023031331 is an equidigital number, since it uses as much as digits as its factorization.

1131023031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474886740.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 1131023031331 its reverse (1331303201311), we get a palindrome (2462326232642).

The spelling of 1131023031331 in words is "one trillion, one hundred thirty-one billion, twenty-three million, thirty-one thousand, three hundred thirty-one".