1222221100211 has 2 divisors, whose sum is σ = 1222221100212. Its totient is φ = 1222221100210.

The previous prime is 1222221100207. The next prime is 1222221100273. The reversal of 1222221100211 is 1120011222221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1120011222221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222221100211 - 2² = 1222221100207 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222221100211.

It is not a weakly prime, because it can be changed into another prime (1222221102211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611110550105 + 611110550106.

It is an arithmetic number, because the mean of its divisors is an integer number (611110550106).

Almost surely, 2^{1222221100211} is an apocalyptic number.

1222221100211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222221100211 is an equidigital number, since it uses as much as digits as its factorization.

1222221100211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222221100211 its reverse (1120011222221), we get a palindrome (2342232322432).

The spelling of 1222221100211 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred thousand, two hundred eleven".