222202122200021 has 2 divisors, whose sum is σ = 222202122200022. Its totient is φ = 222202122200020.

The previous prime is 222202122199961. The next prime is 222202122200027. The reversal of 222202122200021 is 120002221202222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220920213658225 + 1281908541796 = 14863385^2 + 1132214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222202122200021 is a prime.

It is a super-2 number, since 2×222202122200021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222202122199966 and 222202122200002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222202122200027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111101061100010 + 111101061100011.

It is an arithmetic number, because the mean of its divisors is an integer number (111101061100011).

Almost surely, 2^{222202122200021} is an apocalyptic number.

It is an amenable number.

222202122200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222202122200021 is an equidigital number, since it uses as much as digits as its factorization.

222202122200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222202122200021 its reverse (120002221202222), we get a palindrome (342204343402243).

The spelling of 222202122200021 in words is "two hundred twenty-two trillion, two hundred two billion, one hundred twenty-two million, two hundred thousand, twenty-one".