21022222001101 has 2 divisors, whose sum is σ = 21022222001102. Its totient is φ = 21022222001100.

The previous prime is 21022222001071. The next prime is 21022222001251. The reversal of 21022222001101 is 10110022222012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20162659381225 + 859562619876 = 4490285^2 + 927126^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022222001101 - 2⁵ = 21022222001069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022222061101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511111000550 + 10511111000551.

It is an arithmetic number, because the mean of its divisors is an integer number (10511111000551).

Almost surely, 2^{21022222001101} is an apocalyptic number.

It is an amenable number.

21022222001101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022222001101 is an equidigital number, since it uses as much as digits as its factorization.

21022222001101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022222001101 its reverse (10110022222012), we get a palindrome (31132244223113).

The spelling of 21022222001101 in words is "twenty-one trillion, twenty-two billion, two hundred twenty-two million, one thousand, one hundred one".