22212100217 has 2 divisors, whose sum is σ = 22212100218. Its totient is φ = 22212100216.

The previous prime is 22212100213. The next prime is 22212100241. The reversal of 22212100217 is 71200121222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16621397776 + 5590702441 = 128924^2 + 74771^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212100217 - 2² = 22212100213 is a prime.

It is not a weakly prime, because it can be changed into another prime (22212100213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106050108 + 11106050109.

It is an arithmetic number, because the mean of its divisors is an integer number (11106050109).

Almost surely, 2^22212100217 is an apocalyptic number.

It is an amenable number.

22212100217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212100217 is an equidigital number, since it uses as much as digits as its factorization.

22212100217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 22212100217 its reverse (71200121222), we get a palindrome (93412221439).

The spelling of 22212100217 in words is "twenty-two billion, two hundred twelve million, one hundred thousand, two hundred seventeen".