21220200023201 has 2 divisors, whose sum is σ = 21220200023202. Its totient is φ = 21220200023200.

The previous prime is 21220200023123. The next prime is 21220200023203. The reversal of 21220200023201 is 10232000202212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10701698109025 + 10518501914176 = 3271345^2 + 3243224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220200023201 is a prime.

Together with 21220200023203, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21220200023201.

It is not a weakly prime, because it can be changed into another prime (21220200023203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610100011600 + 10610100011601.

It is an arithmetic number, because the mean of its divisors is an integer number (10610100011601).

Almost surely, 2^{21220200023201} is an apocalyptic number.

It is an amenable number.

21220200023201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220200023201 is an equidigital number, since it uses as much as digits as its factorization.

21220200023201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21220200023201 its reverse (10232000202212), we get a palindrome (31452200225413).

The spelling of 21220200023201 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, twenty-three thousand, two hundred one".