222123011221 has 4 divisors (see below), whose sum is σ = 231780533472. Its totient is φ = 212465488972.

The previous prime is 222123011213. The next prime is 222123011263. The reversal of 222123011221 is 122110321222.

222123011221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 222123011221 - 2³ = 222123011213 is a prime.

It is a super-2 number, since 2×222123011221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222123011021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4828761091 + ... + 4828761136.

It is an arithmetic number, because the mean of its divisors is an integer number (57945133368).

Almost surely, 2^222123011221 is an apocalyptic number.

It is an amenable number.

222123011221 is a deficient number, since it is larger than the sum of its proper divisors (9657522251).

222123011221 is an equidigital number, since it uses as much as digits as its factorization.

222123011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9657522250.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 222123011221 its reverse (122110321222), we get a palindrome (344233332443).

The spelling of 222123011221 in words is "two hundred twenty-two billion, one hundred twenty-three million, eleven thousand, two hundred twenty-one".