222321202212221 has 4 divisors (see below), whose sum is σ = 254081373956832. Its totient is φ = 190561030467612.

The previous prime is 222321202212217. The next prime is 222321202212229. The reversal of 222321202212221 is 122212202123222.

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 not a de Polignac number, because 222321202212221 - 2² = 222321202212217 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 (222321202212229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15880085872295 + ... + 15880085872308.

It is an arithmetic number, because the mean of its divisors is an integer number (63520343489208).

Almost surely, 2^{222321202212221} is an apocalyptic number.

It is an amenable number.

222321202212221 is a deficient number, since it is larger than the sum of its proper divisors (31760171744611).

222321202212221 is an equidigital number, since it uses as much as digits as its factorization.

222321202212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31760171744610.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 222321202212221 its reverse (122212202123222), we get a palindrome (344533404335443).

The spelling of 222321202212221 in words is "two hundred twenty-two trillion, three hundred twenty-one billion, two hundred two million, two hundred twelve thousand, two hundred twenty-one".