221323112213 has 4 divisors (see below), whose sum is σ = 252940699680. Its totient is φ = 189705524748.

The previous prime is 221323112177. The next prime is 221323112233. The reversal of 221323112213 is 312211323122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312211323122 = 2 ⋅156105661561.

It is a cyclic number.

It is not a de Polignac number, because 221323112213 - 2¹⁰ = 221323111189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323112233) 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, 15808793723 + ... + 15808793736.

It is an arithmetic number, because the mean of its divisors is an integer number (63235174920).

Almost surely, 2^221323112213 is an apocalyptic number.

It is an amenable number.

221323112213 is a deficient number, since it is larger than the sum of its proper divisors (31617587467).

221323112213 is an equidigital number, since it uses as much as digits as its factorization.

221323112213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31617587466.

The product of its digits is 864, while the sum is 23.

Adding to 221323112213 its reverse (312211323122), we get a palindrome (533534435335).

The spelling of 221323112213 in words is "two hundred twenty-one billion, three hundred twenty-three million, one hundred twelve thousand, two hundred thirteen".