1251383797213 has 12 divisors (see below), whose sum is σ = 1379882547484. Its totient is φ = 1133987025600.

The previous prime is 1251383797211. The next prime is 1251383797243. The reversal of 1251383797213 is 3127973831521.

It can be written as a sum of positive squares in 2 ways, for example, as 529906834809 + 721476962404 = 727947^2 + 849398^2 .

It is not a de Polignac number, because 1251383797213 - 2¹ = 1251383797211 is a prime.

It is a super-2 number, since 2×1251383797213² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251383797211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16482918 + ... + 16558663.

Almost surely, 2^{1251383797213} is an apocalyptic number.

It is an amenable number.

1251383797213 is a deficient number, since it is larger than the sum of its proper divisors (128498750271).

1251383797213 is a wasteful number, since it uses less digits than its factorization.

1251383797213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33041916 (or 33041905 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The spelling of 1251383797213 in words is "one trillion, two hundred fifty-one billion, three hundred eighty-three million, seven hundred ninety-seven thousand, two hundred thirteen".