222202021120021 has 2 divisors, whose sum is σ = 222202021120022. Its totient is φ = 222202021120020.

The previous prime is 222202021120003. The next prime is 222202021120031. The reversal of 222202021120021 is 120021120202222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195497414597521 + 26704606522500 = 13982039^2 + 5167650^2 .

It is a cyclic number.

It is not a de Polignac number, because 222202021120021 - 2³⁹ = 221652265306133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222202021120031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111101010560010 + 111101010560011.

It is an arithmetic number, because the mean of its divisors is an integer number (111101010560011).

Almost surely, 2^{222202021120021} is an apocalyptic number.

It is an amenable number.

222202021120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222202021120021 is an equidigital number, since it uses as much as digits as its factorization.

222202021120021 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 222202021120021 its reverse (120021120202222), we get a palindrome (342223141322243).

The spelling of 222202021120021 in words is "two hundred twenty-two trillion, two hundred two billion, twenty-one million, one hundred twenty thousand, twenty-one".