53201131221 has 32 divisors (see below), whose sum is σ = 81341595648. Its totient is φ = 30298357440.

The previous prime is 53201131169. The next prime is 53201131231. The reversal of 53201131221 is 12213110235.

It is not a de Polignac number, because 53201131221 - 2²¹ = 53199034069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53201131231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10109731 + ... + 10114991.

It is an arithmetic number, because the mean of its divisors is an integer number (2541924864).

Almost surely, 2^53201131221 is an apocalyptic number.

It is an amenable number.

53201131221 is a deficient number, since it is larger than the sum of its proper divisors (28140464427).

53201131221 is a wasteful number, since it uses less digits than its factorization.

53201131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 53201131221 its reverse (12213110235), we get a palindrome (65414241456).

The spelling of 53201131221 in words is "fifty-three billion, two hundred one million, one hundred thirty-one thousand, two hundred twenty-one".