21013210213069 has 2 divisors, whose sum is σ = 21013210213070. Its totient is φ = 21013210213068.

The previous prime is 21013210213031. The next prime is 21013210213081. The reversal of 21013210213069 is 96031201231012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13028273680900 + 7984936532169 = 3609470^2 + 2825763^2 .

It is a cyclic number.

It is not a de Polignac number, because 21013210213069 - 2²¹ = 21013208115917 is a prime.

It is a super-2 number, since 2×21013210213069² (a number of 27 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 21013210213069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013210213469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506605106534 + 10506605106535.

It is an arithmetic number, because the mean of its divisors is an integer number (10506605106535).

Almost surely, 2^{21013210213069} is an apocalyptic number.

It is an amenable number.

21013210213069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013210213069 is an equidigital number, since it uses as much as digits as its factorization.

21013210213069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21013210213069 in words is "twenty-one trillion, thirteen billion, two hundred ten million, two hundred thirteen thousand, sixty-nine".