1231113329 has 2 divisors, whose sum is σ = 1231113330. Its totient is φ = 1231113328.

The previous prime is 1231113283. The next prime is 1231113337. The reversal of 1231113329 is 9233111321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1059372304 + 171741025 = 32548^2 + 13105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231113329 - 2²⁰ = 1230064753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231113298 and 1231113307.

It is not a weakly prime, because it can be changed into another prime (1231115329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615556664 + 615556665.

It is an arithmetic number, because the mean of its divisors is an integer number (615556665).

Almost surely, 2^1231113329 is an apocalyptic number.

It is an amenable number.

1231113329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231113329 is an equidigital number, since it uses as much as digits as its factorization.

1231113329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 1231113329 is about 35087.2245838852. The cubic root of 1231113329 is about 1071.7644422957.

The spelling of 1231113329 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, three hundred twenty-nine".