22021101020221 has 2 divisors, whose sum is σ = 22021101020222. Its totient is φ = 22021101020220.

The previous prime is 22021101020161. The next prime is 22021101020309. The reversal of 22021101020221 is 12202010112022.

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., 16955337994596 + 5065763025625 = 4117686^2 + 2250725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22021101020221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021101020195 and 22021101020204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021101080221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010550510110 + 11010550510111.

It is an arithmetic number, because the mean of its divisors is an integer number (11010550510111).

Almost surely, 2^{22021101020221} is an apocalyptic number.

It is an amenable number.

22021101020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021101020221 is an equidigital number, since it uses as much as digits as its factorization.

22021101020221 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 16.

Adding to 22021101020221 its reverse (12202010112022), we get a palindrome (34223111132243).

The spelling of 22021101020221 in words is "twenty-two trillion, twenty-one billion, one hundred one million, twenty thousand, two hundred twenty-one".