222210121 has 4 divisors (see below), whose sum is σ = 253954432. Its totient is φ = 190465812.

The previous prime is 222210113. The next prime is 222210133. The reversal of 222210121 is 121012222.

It is a happy number.

222210121 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 222210121 - 2³ = 222210113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222210101) 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, 15872145 + ... + 15872158.

It is an arithmetic number, because the mean of its divisors is an integer number (63488608).

Almost surely, 2^222210121 is an apocalyptic number.

It is an amenable number.

222210121 is a deficient number, since it is larger than the sum of its proper divisors (31744311).

222210121 is an equidigital number, since it uses as much as digits as its factorization.

222210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31744310.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 222210121 is about 14906.7139571403. The cubic root of 222210121 is about 605.6958693878.

Adding to 222210121 its reverse (121012222), we get a palindrome (343222343).

The spelling of 222210121 in words is "two hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".