22010101001221 has 2 divisors, whose sum is σ = 22010101001222. Its totient is φ = 22010101001220.

The previous prime is 22010101001171. The next prime is 22010101001261. The reversal of 22010101001221 is 12210010101022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17138656092996 + 4871444908225 = 4139886^2 + 2207135^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010101001221 - 2⁹ = 22010101000709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22010101001261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005050500610 + 11005050500611.

It is an arithmetic number, because the mean of its divisors is an integer number (11005050500611).

Almost surely, 2^{22010101001221} is an apocalyptic number.

It is an amenable number.

22010101001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22010101001221 is an equidigital number, since it uses as much as digits as its factorization.

22010101001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22010101001221 its reverse (12210010101022), we get a palindrome (34220111102243).

The spelling of 22010101001221 in words is "twenty-two trillion, ten billion, one hundred one million, one thousand, two hundred twenty-one".