1231113233 has 16 divisors (see below), whose sum is σ = 1441569024. Its totient is φ = 1029611520.

The previous prime is 1231113211. The next prime is 1231113251. The reversal of 1231113233 is 3323111321.

It is not a de Polignac number, because 1231113233 - 2⁸ = 1231112977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231113283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35441 + ... + 60977.

It is an arithmetic number, because the mean of its divisors is an integer number (90098064).

Almost surely, 2^1231113233 is an apocalyptic number.

It is an amenable number.

1231113233 is a deficient number, since it is larger than the sum of its proper divisors (210455791).

1231113233 is an equidigital number, since it uses as much as digits as its factorization.

1231113233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25712.

The product of its digits is 324, while the sum is 20.

The square root of 1231113233 is about 35087.2232158659. The cubic root of 1231113233 is about 1071.7644144376.

Adding to 1231113233 its reverse (3323111321), we get a palindrome (4554224554).

The spelling of 1231113233 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, two hundred thirty-three".