210223211200021 has 2 divisors, whose sum is σ = 210223211200022. Its totient is φ = 210223211200020.

The previous prime is 210223211199983. The next prime is 210223211200087. The reversal of 210223211200021 is 120002112322012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203455591053796 + 6767620146225 = 14263786^2 + 2601465^2 .

It is a cyclic number.

It is not a de Polignac number, because 210223211200021 - 2⁷ = 210223211199893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210223211200721) 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, 105111605600010 + 105111605600011.

It is an arithmetic number, because the mean of its divisors is an integer number (105111605600011).

Almost surely, 2^{210223211200021} is an apocalyptic number.

It is an amenable number.

210223211200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210223211200021 is an equidigital number, since it uses as much as digits as its factorization.

210223211200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 210223211200021 its reverse (120002112322012), we get a palindrome (330225323522033).

The spelling of 210223211200021 in words is "two hundred ten trillion, two hundred twenty-three billion, two hundred eleven million, two hundred thousand, twenty-one".