1231402403123 has 8 divisors (see below), whose sum is σ = 1234077043200. Its totient is φ = 1228728362760.

The previous prime is 1231402403117. The next prime is 1231402403131. The reversal of 1231402403123 is 3213042041321.

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 1231402403123 - 2⁶ = 1231402403059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231402403092 and 1231402403101.

It is not an unprimeable number, because it can be changed into a prime (1231402003123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4091078 + ... + 4381748.

It is an arithmetic number, because the mean of its divisors is an integer number (154259630400).

Almost surely, 2^{1231402403123} is an apocalyptic number.

1231402403123 is a deficient number, since it is larger than the sum of its proper divisors (2674640077).

1231402403123 is an equidigital number, since it uses as much as digits as its factorization.

1231402403123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299857.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 1231402403123 its reverse (3213042041321), we get a palindrome (4444444444444).

The spelling of 1231402403123 in words is "one trillion, two hundred thirty-one billion, four hundred two million, four hundred three thousand, one hundred twenty-three".