220000002200021 has 2 divisors, whose sum is σ = 220000002200022. Its totient is φ = 220000002200020.

The previous prime is 220000002199981. The next prime is 220000002200131. The reversal of 220000002200021 is 120002200000022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196574111799121 + 23425890400900 = 14020489^2 + 4840030^2 .

It is a cyclic number.

It is not a de Polignac number, because 220000002200021 - 2²² = 219999998005717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220000002199975 and 220000002200011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220000002200621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000001100010 + 110000001100011.

It is an arithmetic number, because the mean of its divisors is an integer number (110000001100011).

Almost surely, 2^{220000002200021} is an apocalyptic number.

It is an amenable number.

220000002200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000002200021 is an equidigital number, since it uses as much as digits as its factorization.

220000002200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 220000002200021 its reverse (120002200000022), we get a palindrome (340002202200043).

The spelling of 220000002200021 in words is "two hundred twenty trillion, two million, two hundred thousand, twenty-one".