221122201102021 has 2 divisors, whose sum is σ = 221122201102022. Its totient is φ = 221122201102020.

The previous prime is 221122201101943. The next prime is 221122201102031. The reversal of 221122201102021 is 120201102221122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113216622508900 + 107905578593121 = 10640330^2 + 10387761^2 .

It is a cyclic number.

It is not a de Polignac number, because 221122201102021 - 2³³ = 221113611167429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221122201102021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221122201102031) 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, 110561100551010 + 110561100551011.

It is an arithmetic number, because the mean of its divisors is an integer number (110561100551011).

Almost surely, 2^{221122201102021} is an apocalyptic number.

It is an amenable number.

221122201102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

221122201102021 is an equidigital number, since it uses as much as digits as its factorization.

221122201102021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221122201102021 its reverse (120201102221122), we get a palindrome (341323303323143).

The spelling of 221122201102021 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred one million, one hundred two thousand, twenty-one".