52001332115221 has 4 divisors (see below), whose sum is σ = 52713679130572. Its totient is φ = 51288985099872.

The previous prime is 52001332115219. The next prime is 52001332115273. The reversal of 52001332115221 is 12251123310025.

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 21756160922500 + 30245171192721 = 4664350^2 + 5499561^2 .

It is a cyclic number.

It is not a de Polignac number, because 52001332115221 - 2¹ = 52001332115219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52001332115221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52001332115521) 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, 356173507566 + ... + 356173507711.

It is an arithmetic number, because the mean of its divisors is an integer number (13178419782643).

Almost surely, 2^{52001332115221} is an apocalyptic number.

It is an amenable number.

52001332115221 is a deficient number, since it is larger than the sum of its proper divisors (712347015351).

52001332115221 is an equidigital number, since it uses as much as digits as its factorization.

52001332115221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712347015350.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 52001332115221 its reverse (12251123310025), we get a palindrome (64252455425246).

The spelling of 52001332115221 in words is "fifty-two trillion, one billion, three hundred thirty-two million, one hundred fifteen thousand, two hundred twenty-one".