21010212330169 has 2 divisors, whose sum is σ = 21010212330170. Its totient is φ = 21010212330168.

The previous prime is 21010212330101. The next prime is 21010212330271. The reversal of 21010212330169 is 96103321201012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16926337190569 + 4083875139600 = 4114163^2 + 2020860^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010212330169 - 2³¹ = 21008064846521 is a prime.

It is a super-2 number, since 2×21010212330169² (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 21010212330169.

It is not a weakly prime, because it can be changed into another prime (21010212330769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505106165084 + 10505106165085.

It is an arithmetic number, because the mean of its divisors is an integer number (10505106165085).

Almost surely, 2^{21010212330169} is an apocalyptic number.

It is an amenable number.

21010212330169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010212330169 is an equidigital number, since it uses as much as digits as its factorization.

21010212330169 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 21010212330169 in words is "twenty-one trillion, ten billion, two hundred twelve million, three hundred thirty thousand, one hundred sixty-nine".