2212222110221 has 2 divisors, whose sum is σ = 2212222110222. Its totient is φ = 2212222110220.

The previous prime is 2212222110191. The next prime is 2212222110313. The reversal of 2212222110221 is 1220112222122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2122443973321 + 89778136900 = 1456861^2 + 299630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212222110221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212222110193 and 2212222110202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2212222110121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106111055110 + 1106111055111.

It is an arithmetic number, because the mean of its divisors is an integer number (1106111055111).

Almost surely, 2^{2212222110221} is an apocalyptic number.

It is an amenable number.

2212222110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212222110221 is an equidigital number, since it uses as much as digits as its factorization.

2212222110221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2212222110221 its reverse (1220112222122), we get a palindrome (3432334332343).

The spelling of 2212222110221 in words is "two trillion, two hundred twelve billion, two hundred twenty-two million, one hundred ten thousand, two hundred twenty-one".