21230212221293 has 2 divisors, whose sum is σ = 21230212221294. Its totient is φ = 21230212221292.

The previous prime is 21230212221223. The next prime is 21230212221299. The reversal of 21230212221293 is 39212221203212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11288437469929 + 9941774751364 = 3359827^2 + 3153058^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230212221293 - 2¹⁴ = 21230212204909 is a prime.

It is a super-2 number, since 2×21230212221293² (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 (21230212221299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615106110646 + 10615106110647.

It is an arithmetic number, because the mean of its divisors is an integer number (10615106110647).

Almost surely, 2^{21230212221293} is an apocalyptic number.

It is an amenable number.

21230212221293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230212221293 is an equidigital number, since it uses as much as digits as its factorization.

21230212221293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 21230212221293 in words is "twenty-one trillion, two hundred thirty billion, two hundred twelve million, two hundred twenty-one thousand, two hundred ninety-three".