222002202222221 has 2 divisors, whose sum is σ = 222002202222222. Its totient is φ = 222002202222220.

The previous prime is 222002202222179. The next prime is 222002202222223. The reversal of 222002202222221 is 122222202200222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196412656972900 + 25589545249321 = 14014730^2 + 5058611^2 .

It is a cyclic number.

It is not a de Polignac number, because 222002202222221 - 2³⁴ = 221985022353037 is a prime.

Together with 222002202222223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222002202222223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111001101111110 + 111001101111111.

It is an arithmetic number, because the mean of its divisors is an integer number (111001101111111).

Almost surely, 2^{222002202222221} is an apocalyptic number.

It is an amenable number.

222002202222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222002202222221 is an equidigital number, since it uses as much as digits as its factorization.

222002202222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 222002202222221 its reverse (122222202200222), we get a palindrome (344224404422443).

The spelling of 222002202222221 in words is "two hundred twenty-two trillion, two billion, two hundred two million, two hundred twenty-two thousand, two hundred twenty-one".