1231311203 has 8 divisors (see below), whose sum is σ = 1275335280. Its totient is φ = 1187391520.

The previous prime is 1231311199. The next prime is 1231311223. The reversal of 1231311203 is 3021131321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231311203 - 2² = 1231311199 is a prime.

It is a super-2 number, since 2×1231311203² = 3032254557266614418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231311223) 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 in 7 ways as a sum of consecutive naturals, for example, 1688 + ... + 49653.

It is an arithmetic number, because the mean of its divisors is an integer number (159416910).

Almost surely, 2^1231311203 is an apocalyptic number.

1231311203 is a deficient number, since it is larger than the sum of its proper divisors (44024077).

1231311203 is an equidigital number, since it uses as much as digits as its factorization.

1231311203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52197.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1231311203 is about 35090.0442148482. The cubic root of 1231311203 is about 1071.8218599602.

Adding to 1231311203 its reverse (3021131321), we get a palindrome (4252442524).

The spelling of 1231311203 in words is "one billion, two hundred thirty-one million, three hundred eleven thousand, two hundred three".