52121721666722 has 16 divisors (see below), whose sum is σ = 79071238053720. Its totient is φ = 25764717868032.

The previous prime is 52121721666713. The next prime is 52121721666739. The reversal of 52121721666722 is 22766612712125.

It can be written as a sum of positive squares in 4 ways, for example, as 42190078261321 + 9931643405401 = 6495389^2 + 3151451^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17504183 + ... + 20264250.

Almost surely, 2^{52121721666722} is an apocalyptic number.

52121721666722 is a deficient number, since it is larger than the sum of its proper divisors (26949516386998).

52121721666722 is a wasteful number, since it uses less digits than its factorization.

52121721666722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37776277.

The product of its digits is 1693440, while the sum is 50.

The spelling of 52121721666722 in words is "fifty-two trillion, one hundred twenty-one billion, seven hundred twenty-one million, six hundred sixty-six thousand, seven hundred twenty-two".