222120102020221 has 2 divisors, whose sum is σ = 222120102020222. Its totient is φ = 222120102020220.

The previous prime is 222120102020183. The next prime is 222120102020237. The reversal of 222120102020221 is 122020201021222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153038820424996 + 69081281595225 = 12370886^2 + 8311515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222120102020221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222120102020281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060051010110 + 111060051010111.

It is an arithmetic number, because the mean of its divisors is an integer number (111060051010111).

Almost surely, 2^{222120102020221} is an apocalyptic number.

It is an amenable number.

222120102020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222120102020221 is an equidigital number, since it uses as much as digits as its factorization.

222120102020221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222120102020221 its reverse (122020201021222), we get a palindrome (344140303041443).

The spelling of 222120102020221 in words is "two hundred twenty-two trillion, one hundred twenty billion, one hundred two million, twenty thousand, two hundred twenty-one".