1131111233231 has 12 divisors (see below), whose sum is σ = 1315801369008. Its totient is φ = 969509977632.

The previous prime is 1131111233167. The next prime is 1131111233267. The reversal of 1131111233231 is 1323321111311.

It is not a de Polignac number, because 1131111233231 - 2⁶ = 1131111233167 is a prime.

It is a super-2 number, since 2×1131111233231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131111233197 and 1131111233206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131111233431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4747310 + ... + 4979876.

It is an arithmetic number, because the mean of its divisors is an integer number (109650114084).

Almost surely, 2^{1131111233231} is an apocalyptic number.

1131111233231 is a deficient number, since it is larger than the sum of its proper divisors (184690135777).

1131111233231 is an equidigital number, since it uses as much as digits as its factorization.

1131111233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331838 (or 331831 counting only the distinct ones).

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

Adding to 1131111233231 its reverse (1323321111311), we get a palindrome (2454432344542).

The spelling of 1131111233231 in words is "one trillion, one hundred thirty-one billion, one hundred eleven million, two hundred thirty-three thousand, two hundred thirty-one".