222010121 has 4 divisors (see below), whose sum is σ = 227425044. Its totient is φ = 216595200.

The previous prime is 222010111. The next prime is 222010147. The reversal of 222010121 is 121010222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10627600 + 211382521 = 3260^2 + 14539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222010121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222010111) 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, 2707400 + ... + 2707481.

It is an arithmetic number, because the mean of its divisors is an integer number (56856261).

Almost surely, 2^222010121 is an apocalyptic number.

It is an amenable number.

222010121 is a deficient number, since it is larger than the sum of its proper divisors (5414923).

222010121 is an equidigital number, since it uses as much as digits as its factorization.

222010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5414922.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 222010121 is about 14900.0040604021. The cubic root of 222010121 is about 605.5140961855.

Adding to 222010121 its reverse (121010222), we get a palindrome (343020343).

The spelling of 222010121 in words is "two hundred twenty-two million, ten thousand, one hundred twenty-one".