1251310221113 has 16 divisors (see below), whose sum is σ = 1265031930624. Its totient is φ = 1237658175360.

The previous prime is 1251310221107. The next prime is 1251310221121. The reversal of 1251310221113 is 3111220131521.

It is not a de Polignac number, because 1251310221113 - 2⁸ = 1251310220857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1251310221613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172900931 + ... + 172908167.

It is an arithmetic number, because the mean of its divisors is an integer number (79064495664).

Almost surely, 2^{1251310221113} is an apocalyptic number.

It is an amenable number.

1251310221113 is a deficient number, since it is larger than the sum of its proper divisors (13721709511).

1251310221113 is a wasteful number, since it uses less digits than its factorization.

1251310221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11792.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 1251310221113 its reverse (3111220131521), we get a palindrome (4362530352634).

The spelling of 1251310221113 in words is "one trillion, two hundred fifty-one billion, three hundred ten million, two hundred twenty-one thousand, one hundred thirteen".