1231011303 has 16 divisors (see below), whose sum is σ = 1648448256. Its totient is φ = 817133760.

The previous prime is 1231011269. The next prime is 1231011373. The reversal of 1231011303 is 3031101321.

It is not a de Polignac number, because 1231011303 - 2²⁸ = 962575847 is a prime.

It is a super-2 number, since 2×1231011303² = 3030777656227515618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231011373) 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, 1127788 + ... + 1128878.

It is an arithmetic number, because the mean of its divisors is an integer number (103028016).

Almost surely, 2^1231011303 is an apocalyptic number.

1231011303 is a deficient number, since it is larger than the sum of its proper divisors (417436953).

1231011303 is a wasteful number, since it uses less digits than its factorization.

1231011303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1231011303 is about 35085.7706627630. The cubic root of 1231011303 is about 1071.7348347155.

Adding to 1231011303 its reverse (3031101321), we get a palindrome (4262112624).

The spelling of 1231011303 in words is "one billion, two hundred thirty-one million, eleven thousand, three hundred three".