52121167604221 has 8 divisors (see below), whose sum is σ = 52986343605624. Its totient is φ = 51256337752320.

The previous prime is 52121167604171. The next prime is 52121167604237. The reversal of 52121167604221 is 12240676112125.

It can be written as a sum of positive squares in 4 ways, for example, as 3564506240100 + 48556661364121 = 1887990^2 + 6968261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52121167604221 - 2²⁷ = 52121033386493 is a prime.

It is a super-2 number, since 2×52121167604221² (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 (52121167104221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86233720 + ... + 86836033.

It is an arithmetic number, because the mean of its divisors is an integer number (6623292950703).

Almost surely, 2^{52121167604221} is an apocalyptic number.

It is an amenable number.

52121167604221 is a deficient number, since it is larger than the sum of its proper divisors (865176001403).

52121167604221 is a wasteful number, since it uses less digits than its factorization.

52121167604221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173074751.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 52121167604221 in words is "fifty-two trillion, one hundred twenty-one billion, one hundred sixty-seven million, six hundred four thousand, two hundred twenty-one".