210221220202069 has 2 divisors, whose sum is σ = 210221220202070. Its totient is φ = 210221220202068.

The previous prime is 210221220202051. The next prime is 210221220202111. The reversal of 210221220202069 is 960202022122012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150622233480625 + 59598986721444 = 12272825^2 + 7720038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210221220202069 is a prime.

It is a super-2 number, since 2×210221220202069² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210221220202069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210221220203069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110610101034 + 105110610101035.

It is an arithmetic number, because the mean of its divisors is an integer number (105110610101035).

Almost surely, 2^{210221220202069} is an apocalyptic number.

It is an amenable number.

210221220202069 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221220202069 is an equidigital number, since it uses as much as digits as its factorization.

210221220202069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 210221220202069 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred twenty million, two hundred two thousand, sixty-nine".