5051311331021 has 4 divisors (see below), whose sum is σ = 5085212749500. Its totient is φ = 5017409912544.

The previous prime is 5051311330991. The next prime is 5051311331023. The reversal of 5051311331021 is 1201331131505.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3195692522500 + 1855618808521 = 1787650^2 + 1362211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5051311331021 is a prime.

It is a super-2 number, since 2×5051311331021² (a number of 26 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 (5051311331023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16950709016 + ... + 16950709313.

It is an arithmetic number, because the mean of its divisors is an integer number (1271303187375).

Almost surely, 2^{5051311331021} is an apocalyptic number.

It is an amenable number.

5051311331021 is a deficient number, since it is larger than the sum of its proper divisors (33901418479).

5051311331021 is a wasteful number, since it uses less digits than its factorization.

5051311331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33901418478.

The product of its (nonzero) digits is 1350, while the sum is 26.

Adding to 5051311331021 its reverse (1201331131505), we get a palindrome (6252642462526).

The spelling of 5051311331021 in words is "five trillion, fifty-one billion, three hundred eleven million, three hundred thirty-one thousand, twenty-one".