222222021221221 has 12 divisors (see below), whose sum is σ = 258847379526720. Its totient is φ = 190222388307000.

The previous prime is 222222021221171. The next prime is 222222021221293. The reversal of 222222021221221 is 122122120222222.

It is not a de Polignac number, because 222222021221221 - 2²³ = 222222012832613 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 (222222021221021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3019366191 + ... + 3019439788.

It is an arithmetic number, because the mean of its divisors is an integer number (21570614960560).

Almost surely, 2^{222222021221221} is an apocalyptic number.

It is an amenable number.

222222021221221 is a deficient number, since it is larger than the sum of its proper divisors (36625358305499).

222222021221221 is an equidigital number, since it uses as much as digits as its factorization.

222222021221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038806744 (or 6038806737 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 222222021221221 its reverse (122122120222222), we get a palindrome (344344141443443).

The spelling of 222222021221221 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".