1251320330151 has 16 divisors (see below), whose sum is σ = 1853850616800. Its totient is φ = 834194329344.

The previous prime is 1251320330123. The next prime is 1251320330153. The reversal of 1251320330151 is 1510330231521.

1251320330151 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 320 + 330 + 1 + 5 + 1 = 666.

It is not a de Polignac number, because 1251320330151 - 2⁵ = 1251320330119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251320330153) 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, 712215 + ... + 1734903.

It is an arithmetic number, because the mean of its divisors is an integer number (115865663550).

Almost surely, 2^{1251320330151} is an apocalyptic number.

1251320330151 is a deficient number, since it is larger than the sum of its proper divisors (602530286649).

1251320330151 is a wasteful number, since it uses less digits than its factorization.

1251320330151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068015 (or 1068009 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 1251320330151 its reverse (1510330231521), we get a palindrome (2761650561672).

The spelling of 1251320330151 in words is "one trillion, two hundred fifty-one billion, three hundred twenty million, three hundred thirty thousand, one hundred fifty-one".