1231133203 has 2 divisors, whose sum is σ = 1231133204. Its totient is φ = 1231133202.

The previous prime is 1231133191. The next prime is 1231133207. The reversal of 1231133203 is 3023311321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231133203 - 2²¹ = 1229036051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231133207) 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, 615566601 + 615566602.

It is an arithmetic number, because the mean of its divisors is an integer number (615566602).

Almost surely, 2^1231133203 is an apocalyptic number.

1231133203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231133203 is an equidigital number, since it uses as much as digits as its factorization.

1231133203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1231133203 is about 35087.5077912353. The cubic root of 1231133203 is about 1071.7702094691.

Adding to 1231133203 its reverse (3023311321), we get a palindrome (4254444524).

The spelling of 1231133203 in words is "one billion, two hundred thirty-one million, one hundred thirty-three thousand, two hundred three".