201222222000221 has 2 divisors, whose sum is σ = 201222222000222. Its totient is φ = 201222222000220.

The previous prime is 201222222000199. The next prime is 201222222000409. The reversal of 201222222000221 is 122000222222102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192338454280996 + 8883767719225 = 13868614^2 + 2980565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201222222000221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201222222000193 and 201222222000202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201222222000521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100611111000110 + 100611111000111.

It is an arithmetic number, because the mean of its divisors is an integer number (100611111000111).

Almost surely, 2^{201222222000221} is an apocalyptic number.

It is an amenable number.

201222222000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201222222000221 is an equidigital number, since it uses as much as digits as its factorization.

201222222000221 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 201222222000221 its reverse (122000222222102), we get a palindrome (323222444222323).

The spelling of 201222222000221 in words is "two hundred one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one", and thus it is an aban number.