222124421221 has 4 divisors (see below), whose sum is σ = 222185131200. Its totient is φ = 222063711244.

The previous prime is 222124421219. The next prime is 222124421279. The reversal of 222124421221 is 122124421222.

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: 122124421222 = 2 ⋅61062210611.

It is a cyclic number.

It is not a de Polignac number, because 222124421221 - 2¹ = 222124421219 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 (222124421291) 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, 30349501 + ... + 30356818.

It is an arithmetic number, because the mean of its divisors is an integer number (55546282800).

Almost surely, 2^222124421221 is an apocalyptic number.

It is an amenable number.

222124421221 is a deficient number, since it is larger than the sum of its proper divisors (60709979).

222124421221 is an equidigital number, since it uses as much as digits as its factorization.

222124421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60709978.

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

Adding to 222124421221 its reverse (122124421222), we get a palindrome (344248842443).

Subtracting from 222124421221 its reverse (122124421222), we obtain a palindrome (99999999999).

The spelling of 222124421221 in words is "two hundred twenty-two billion, one hundred twenty-four million, four hundred twenty-one thousand, two hundred twenty-one".