222222121013 has 2 divisors, whose sum is σ = 222222121014. Its totient is φ = 222222121012.

The previous prime is 222222121003. The next prime is 222222121021. The reversal of 222222121013 is 310121222222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174491669284 + 47730451729 = 417722^2 + 218473^2 .

It is a cyclic number.

It is not a de Polignac number, because 222222121013 - 2²⁸ = 221953685557 is a prime.

It is a super-2 number, since 2×222222121013² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222222121003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111060506 + 111111060507.

It is an arithmetic number, because the mean of its divisors is an integer number (111111060507).

Almost surely, 2^222222121013 is an apocalyptic number.

It is an amenable number.

222222121013 is a deficient number, since it is larger than the sum of its proper divisors (1).

222222121013 is an equidigital number, since it uses as much as digits as its factorization.

222222121013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 222222121013 its reverse (310121222222), we get a palindrome (532343343235).

The spelling of 222222121013 in words is "two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, thirteen".