1251310520113 has 8 divisors (see below), whose sum is σ = 1319787604800. Its totient is φ = 1183095299088.

The previous prime is 1251310520101. The next prime is 1251310520137. The reversal of 1251310520113 is 3110250131521.

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 1251310520113 - 2⁵ = 1251310520081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251310520153) 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, 65456098 + ... + 65475211.

It is an arithmetic number, because the mean of its divisors is an integer number (164973450600).

Almost surely, 2^{1251310520113} is an apocalyptic number.

It is an amenable number.

1251310520113 is a deficient number, since it is larger than the sum of its proper divisors (68477084687).

1251310520113 is a wasteful number, since it uses less digits than its factorization.

1251310520113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130931831.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 1251310520113 its reverse (3110250131521), we get a palindrome (4361560651634).

The spelling of 1251310520113 in words is "one trillion, two hundred fifty-one billion, three hundred ten million, five hundred twenty thousand, one hundred thirteen".