221002100210069 has 2 divisors, whose sum is σ = 221002100210070. Its totient is φ = 221002100210068.

The previous prime is 221002100209997. The next prime is 221002100210077. The reversal of 221002100210069 is 960012001200122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210837079252900 + 10165020957169 = 14520230^2 + 3188263^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002100210069 - 2¹² = 221002100205973 is a prime.

It is a super-2 number, since 2×221002100210069² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221002100210369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501050105034 + 110501050105035.

It is an arithmetic number, because the mean of its divisors is an integer number (110501050105035).

Almost surely, 2^{221002100210069} is an apocalyptic number.

It is an amenable number.

221002100210069 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002100210069 is an equidigital number, since it uses as much as digits as its factorization.

221002100210069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 221002100210069 in words is "two hundred twenty-one trillion, two billion, one hundred million, two hundred ten thousand, sixty-nine".