222213012121 has 2 divisors, whose sum is σ = 222213012122. Its totient is φ = 222213012120.

The previous prime is 222213012089. The next prime is 222213012127. The reversal of 222213012121 is 121210312222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186732015625 + 35480996496 = 432125^2 + 188364^2 .

It is a cyclic number.

It is not a de Polignac number, because 222213012121 - 2⁵ = 222213012089 is a prime.

It is not a weakly prime, because it can be changed into another prime (222213012127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111106506060 + 111106506061.

It is an arithmetic number, because the mean of its divisors is an integer number (111106506061).

Almost surely, 2^222213012121 is an apocalyptic number.

It is an amenable number.

222213012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222213012121 is an equidigital number, since it uses as much as digits as its factorization.

222213012121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 222213012121 its reverse (121210312222), we get a palindrome (343423324343).

The spelling of 222213012121 in words is "two hundred twenty-two billion, two hundred thirteen million, twelve thousand, one hundred twenty-one".