21002200022101 has 2 divisors, whose sum is σ = 21002200022102. Its totient is φ = 21002200022100.

The previous prime is 21002200022071. The next prime is 21002200022119. The reversal of 21002200022101 is 10122000220012.

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., 13361254643025 + 7640945379076 = 3655305^2 + 2764226^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002200022101 - 2²¹ = 21002197924949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002200052101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501100011050 + 10501100011051.

It is an arithmetic number, because the mean of its divisors is an integer number (10501100011051).

Almost surely, 2^{21002200022101} is an apocalyptic number.

It is an amenable number.

21002200022101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002200022101 is an equidigital number, since it uses as much as digits as its factorization.

21002200022101 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 21002200022101 its reverse (10122000220012), we get a palindrome (31124200242113).

The spelling of 21002200022101 in words is "twenty-one trillion, two billion, two hundred million, twenty-two thousand, one hundred one".