52210001171221 has 4 divisors (see below), whose sum is σ = 52210074671244. Its totient is φ = 52209927671200.

The previous prime is 52210001171189. The next prime is 52210001171231. The reversal of 52210001171221 is 12217110001225.

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 19479988540996 + 32730012630225 = 4413614^2 + 5721015^2 .

It is a cyclic number.

It is not a de Polignac number, because 52210001171221 - 2⁵ = 52210001171189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52210001171231) 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, 35674000 + ... + 37108681.

It is an arithmetic number, because the mean of its divisors is an integer number (13052518667811).

Almost surely, 2^{52210001171221} is an apocalyptic number.

It is an amenable number.

52210001171221 is a deficient number, since it is larger than the sum of its proper divisors (73500023).

52210001171221 is an equidigital number, since it uses as much as digits as its factorization.

52210001171221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73500022.

The product of its (nonzero) digits is 560, while the sum is 25.

Adding to 52210001171221 its reverse (12217110001225), we get a palindrome (64427111172446).

The spelling of 52210001171221 in words is "fifty-two trillion, two hundred ten billion, one million, one hundred seventy-one thousand, two hundred twenty-one".