21002210020201 has 2 divisors, whose sum is σ = 21002210020202. Its totient is φ = 21002210020200.

The previous prime is 21002210020189. The next prime is 21002210020213. The reversal of 21002210020201 is 10202001220012.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (21002210020189) and next prime (21002210020213).

It can be written as a sum of positive squares in only one way, i.e., 20988758659801 + 13451360400 = 4581349^2 + 115980^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002210020201 - 2⁷ = 21002210020073 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002210020301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501105010100 + 10501105010101.

It is an arithmetic number, because the mean of its divisors is an integer number (10501105010101).

Almost surely, 2^{21002210020201} is an apocalyptic number.

It is an amenable number.

21002210020201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002210020201 is an equidigital number, since it uses as much as digits as its factorization.

21002210020201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21002210020201 its reverse (10202001220012), we get a palindrome (31204211240213).

The spelling of 21002210020201 in words is "twenty-one trillion, two billion, two hundred ten million, twenty thousand, two hundred one".