1251431234203 has 6 divisors (see below), whose sum is σ = 1308206942924. Its totient is φ = 1197021180036.

The previous prime is 1251431234149. The next prime is 1251431234269. The reversal of 1251431234203 is 3024321341521.

It is not a de Polignac number, because 1251431234203 - 2⁹ = 1251431233691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251431234003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1182826725 + ... + 1182827782.

Almost surely, 2^{1251431234203} is an apocalyptic number.

1251431234203 is a deficient number, since it is larger than the sum of its proper divisors (56775708721).

1251431234203 is an equidigital number, since it uses as much as digits as its factorization.

1251431234203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365654553 (or 2365654530 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 1251431234203 its reverse (3024321341521), we get a palindrome (4275752575724).

The spelling of 1251431234203 in words is "one trillion, two hundred fifty-one billion, four hundred thirty-one million, two hundred thirty-four thousand, two hundred three".