1231013103 has 8 divisors (see below), whose sum is σ = 1644013488. Its totient is φ = 819344064.

The previous prime is 1231013099. The next prime is 1231013209. The reversal of 1231013103 is 3013101321.

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

It is not a de Polignac number, because 1231013103 - 2² = 1231013099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231012103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330676 + ... + 334377.

It is an arithmetic number, because the mean of its divisors is an integer number (205501686).

Almost surely, 2^1231013103 is an apocalyptic number.

1231013103 is a deficient number, since it is larger than the sum of its proper divisors (413000385).

1231013103 is an equidigital number, since it uses as much as digits as its factorization.

1231013103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665673.

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

The square root of 1231013103 is about 35085.7963141782. The cubic root of 1231013103 is about 1071.7353570833.

Adding to 1231013103 its reverse (3013101321), we get a palindrome (4244114424).

The spelling of 1231013103 in words is "one billion, two hundred thirty-one million, thirteen thousand, one hundred three".