1231331203 has 16 divisors (see below), whose sum is σ = 1265091264. Its totient is φ = 1198149120.

The previous prime is 1231331201. The next prime is 1231331221. The reversal of 1231331203 is 3021331321.

It is a cyclic number.

It is not a de Polignac number, because 1231331203 - 2¹ = 1231331201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231331201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2694151 + ... + 2694607.

It is an arithmetic number, because the mean of its divisors is an integer number (79068204).

Almost surely, 2^1231331203 is an apocalyptic number.

1231331203 is a deficient number, since it is larger than the sum of its proper divisors (33760061).

1231331203 is a wasteful number, since it uses less digits than its factorization.

1231331203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942.

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

The square root of 1231331203 is about 35090.3291948081. The cubic root of 1231331203 is about 1071.8276630751.

Adding to 1231331203 its reverse (3021331321), we get a palindrome (4252662524).

The spelling of 1231331203 in words is "one billion, two hundred thirty-one million, three hundred thirty-one thousand, two hundred three".