222201021202021 has 2 divisors, whose sum is σ = 222201021202022. Its totient is φ = 222201021202020.

The previous prime is 222201021202019. The next prime is 222201021202073. The reversal of 222201021202021 is 120202120102222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221979038879521 + 221982322500 = 14898961^2 + 471150^2 .

It is a cyclic number.

It is not a de Polignac number, because 222201021202021 - 2¹ = 222201021202019 is a prime.

Together with 222201021202019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 222201021202021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222201021202421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111100510601010 + 111100510601011.

It is an arithmetic number, because the mean of its divisors is an integer number (111100510601011).

Almost surely, 2^{222201021202021} is an apocalyptic number.

It is an amenable number.

222201021202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222201021202021 is an equidigital number, since it uses as much as digits as its factorization.

222201021202021 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 222201021202021 its reverse (120202120102222), we get a palindrome (342403141304243).

The spelling of 222201021202021 in words is "two hundred twenty-two trillion, two hundred one billion, twenty-one million, two hundred two thousand, twenty-one".