1023131231131 has 4 divisors (see below), whose sum is σ = 1023149583064. Its totient is φ = 1023112879200.

The previous prime is 1023131231117. The next prime is 1023131231159. The reversal of 1023131231131 is 1311321313201.

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 1023131231131 - 2⁵ = 1023131231099 is a prime.

It is a super-2 number, since 2×1023131231131² (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 (1023131531131) 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, 9092085 + ... + 9203926.

It is an arithmetic number, because the mean of its divisors is an integer number (255787395766).

Almost surely, 2^{1023131231131} is an apocalyptic number.

1023131231131 is a deficient number, since it is larger than the sum of its proper divisors (18351933).

1023131231131 is an equidigital number, since it uses as much as digits as its factorization.

1023131231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18351932.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1023131231131 its reverse (1311321313201), we get a palindrome (2334452544332).

The spelling of 1023131231131 in words is "one trillion, twenty-three billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred thirty-one".