1131323131121 has 4 divisors (see below), whose sum is σ = 1131325396992. Its totient is φ = 1131320865252.

The previous prime is 1131323131063. The next prime is 1131323131151. The reversal of 1131323131121 is 1211313231311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131323131121 - 2²⁶ = 1131256022257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131323131151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18761 + ... + 1504326.

It is an arithmetic number, because the mean of its divisors is an integer number (282831349248).

Almost surely, 2^{1131323131121} is an apocalyptic number.

It is an amenable number.

1131323131121 is a deficient number, since it is larger than the sum of its proper divisors (2265871).

1131323131121 is an equidigital number, since it uses as much as digits as its factorization.

1131323131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265870.

The product of its digits is 324, while the sum is 23.

Adding to 1131323131121 its reverse (1211313231311), we get a palindrome (2342636362432).

The spelling of 1131323131121 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-three million, one hundred thirty-one thousand, one hundred twenty-one".