222022121 has 4 divisors (see below), whose sum is σ = 225335952. Its totient is φ = 218708292.

The previous prime is 222022103. The next prime is 222022147. The reversal of 222022121 is 121220222.

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 a de Polignac number, because none of the positive numbers 2^k-222022121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222022096 and 222022105.

It is not an unprimeable number, because it can be changed into a prime (222022181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1656815 + ... + 1656948.

It is an arithmetic number, because the mean of its divisors is an integer number (56333988).

Almost surely, 2^222022121 is an apocalyptic number.

It is an amenable number.

222022121 is a deficient number, since it is larger than the sum of its proper divisors (3313831).

222022121 is an equidigital number, since it uses as much as digits as its factorization.

222022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313830.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 222022121 is about 14900.4067394149. The cubic root of 222022121 is about 605.5250056555.

Adding to 222022121 its reverse (121220222), we get a palindrome (343242343).

The spelling of 222022121 in words is "two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".