51200122115221 has 16 divisors (see below), whose sum is σ = 53870884257600. Its totient is φ = 48589943246208.

The previous prime is 51200122115209. The next prime is 51200122115257. The reversal of 51200122115221 is 12251122100215.

51200122115221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51200122115221 - 2⁵ = 51200122115189 is a prime.

It is a super-2 number, since 2×51200122115221² (a number of 28 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 (51200122118221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10195126 + ... + 14364568.

It is an arithmetic number, because the mean of its divisors is an integer number (3366930266100).

Almost surely, 2^{51200122115221} is an apocalyptic number.

It is an amenable number.

51200122115221 is a deficient number, since it is larger than the sum of its proper divisors (2670762142379).

51200122115221 is a wasteful number, since it uses less digits than its factorization.

51200122115221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176708.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 51200122115221 its reverse (12251122100215), we get a palindrome (63451244215436).

The spelling of 51200122115221 in words is "fifty-one trillion, two hundred billion, one hundred twenty-two million, one hundred fifteen thousand, two hundred twenty-one".