1231413123403 has 4 divisors (see below), whose sum is σ = 1233079447720. Its totient is φ = 1229746799088.

The previous prime is 1231413123331. The next prime is 1231413123407. The reversal of 1231413123403 is 3043213141321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231413123403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231413123407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833161050 + ... + 833162527.

It is an arithmetic number, because the mean of its divisors is an integer number (308269861930).

Almost surely, 2^{1231413123403} is an apocalyptic number.

1231413123403 is a deficient number, since it is larger than the sum of its proper divisors (1666324317).

1231413123403 is an equidigital number, since it uses as much as digits as its factorization.

1231413123403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666324316.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 1231413123403 its reverse (3043213141321), we get a palindrome (4274626264724).

The spelling of 1231413123403 in words is "one trillion, two hundred thirty-one billion, four hundred thirteen million, one hundred twenty-three thousand, four hundred three".