21210200011069 has 2 divisors, whose sum is σ = 21210200011070. Its totient is φ = 21210200011068.

The previous prime is 21210200011051. The next prime is 21210200011097. The reversal of 21210200011069 is 96011000201212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15344745714169 + 5865454296900 = 3917237^2 + 2421870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210200011069 is a prime.

It is a super-2 number, since 2×21210200011069² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210200081069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605100005534 + 10605100005535.

It is an arithmetic number, because the mean of its divisors is an integer number (10605100005535).

Almost surely, 2^{21210200011069} is an apocalyptic number.

It is an amenable number.

21210200011069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210200011069 is an equidigital number, since it uses as much as digits as its factorization.

21210200011069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 21210200011069 in words is "twenty-one trillion, two hundred ten billion, two hundred million, eleven thousand, sixty-nine".