221323220321131 has 8 divisors (see below), whose sum is σ = 224532724202864. Its totient is φ = 218132651566080.

The previous prime is 221323220321059. The next prime is 221323220321141. The reversal of 221323220321131 is 131123022323122.

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 221323220321131 - 2¹¹ = 221323220319083 is a prime.

It is a super-2 number, since 2×221323220321131² (a number of 29 digits) contains 22 as substring.

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 221323220321131.

It is not an unprimeable number, because it can be changed into a prime (221323220321141) 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, 4733758125 + ... + 4733804878.

It is an arithmetic number, because the mean of its divisors is an integer number (28066590525358).

Almost surely, 2^{221323220321131} is an apocalyptic number.

221323220321131 is a deficient number, since it is larger than the sum of its proper divisors (3209503881733).

221323220321131 is an equidigital number, since it uses as much as digits as its factorization.

221323220321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467563341.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 221323220321131 its reverse (131123022323122), we get a palindrome (352446242644253).

The spelling of 221323220321131 in words is "two hundred twenty-one trillion, three hundred twenty-three billion, two hundred twenty million, three hundred twenty-one thousand, one hundred thirty-one".