53305102101221 has 4 divisors (see below), whose sum is σ = 53533879363692. Its totient is φ = 53076324838752.

The previous prime is 53305102101149. The next prime is 53305102101247. The reversal of 53305102101221 is 12210120150335.

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 15033928324321 + 38271173776900 = 3877361^2 + 6186370^2 .

It is a cyclic number.

It is not a de Polignac number, because 53305102101221 - 2²² = 53305097906917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53305102101281) 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, 114388630886 + ... + 114388631351.

It is an arithmetic number, because the mean of its divisors is an integer number (13383469840923).

Almost surely, 2^{53305102101221} is an apocalyptic number.

It is an amenable number.

53305102101221 is a deficient number, since it is larger than the sum of its proper divisors (228777262471).

53305102101221 is a wasteful number, since it uses less digits than its factorization.

53305102101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228777262470.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 53305102101221 its reverse (12210120150335), we get a palindrome (65515222251556).

The spelling of 53305102101221 in words is "fifty-three trillion, three hundred five billion, one hundred two million, one hundred one thousand, two hundred twenty-one".