221222022002101 has 2 divisors, whose sum is σ = 221222022002102. Its totient is φ = 221222022002100.

The previous prime is 221222022002087. The next prime is 221222022002203. The reversal of 221222022002101 is 101200220222122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121888886508900 + 99333135493201 = 11040330^2 + 9966601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221222022002101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221222022302101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611011001050 + 110611011001051.

It is an arithmetic number, because the mean of its divisors is an integer number (110611011001051).

Almost surely, 2^{221222022002101} is an apocalyptic number.

It is an amenable number.

221222022002101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222022002101 is an equidigital number, since it uses as much as digits as its factorization.

221222022002101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221222022002101 its reverse (101200220222122), we get a palindrome (322422242224223).

The spelling of 221222022002101 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, twenty-two million, two thousand, one hundred one".