221102320213121 has 4 divisors (see below), whose sum is σ = 221351590022592. Its totient is φ = 220853050403652.

The previous prime is 221102320213081. The next prime is 221102320213127. The reversal of 221102320213121 is 121312023201122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221102320213121 - 2¹⁸ = 221102319950977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102320213127) 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, 124634903405 + ... + 124634905178.

It is an arithmetic number, because the mean of its divisors is an integer number (55337897505648).

Almost surely, 2^{221102320213121} is an apocalyptic number.

It is an amenable number.

221102320213121 is a deficient number, since it is larger than the sum of its proper divisors (249269809471).

221102320213121 is an equidigital number, since it uses as much as digits as its factorization.

221102320213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249269809470.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 221102320213121 its reverse (121312023201122), we get a palindrome (342414343414243).

The spelling of 221102320213121 in words is "two hundred twenty-one trillion, one hundred two billion, three hundred twenty million, two hundred thirteen thousand, one hundred twenty-one".