21230212219193 has 2 divisors, whose sum is σ = 21230212219194. Its totient is φ = 21230212219192.

The previous prime is 21230212219189. The next prime is 21230212219199. The reversal of 21230212219193 is 39191221203212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19553800993024 + 1676411226169 = 4421968^2 + 1294763^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230212219193 - 2² = 21230212219189 is a prime.

It is not a weakly prime, because it can be changed into another prime (21230212219199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615106109596 + 10615106109597.

It is an arithmetic number, because the mean of its divisors is an integer number (10615106109597).

Almost surely, 2^{21230212219193} is an apocalyptic number.

It is an amenable number.

21230212219193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230212219193 is an equidigital number, since it uses as much as digits as its factorization.

21230212219193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 21230212219193 in words is "twenty-one trillion, two hundred thirty billion, two hundred twelve million, two hundred nineteen thousand, one hundred ninety-three".