5105512056721 has 4 divisors (see below), whose sum is σ = 5105650954752. Its totient is φ = 5105373158692.

The previous prime is 5105512056713. The next prime is 5105512056803. The reversal of 5105512056721 is 1276502155015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5105512056721 - 2³ = 5105512056713 is a prime.

It is a super-2 number, since 2×5105512056721² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5105512056121) 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, 69393865 + ... + 69467398.

It is an arithmetic number, because the mean of its divisors is an integer number (1276412738688).

Almost surely, 2^{5105512056721} is an apocalyptic number.

It is an amenable number.

5105512056721 is a deficient number, since it is larger than the sum of its proper divisors (138898031).

5105512056721 is a wasteful number, since it uses less digits than its factorization.

5105512056721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138898030.

The product of its (nonzero) digits is 105000, while the sum is 40.

The spelling of 5105512056721 in words is "five trillion, one hundred five billion, five hundred twelve million, fifty-six thousand, seven hundred twenty-one".