221021102900189 has 2 divisors, whose sum is σ = 221021102900190. Its totient is φ = 221021102900188.

The previous prime is 221021102900167. The next prime is 221021102900261. The reversal of 221021102900189 is 981009201120122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122381782516900 + 98639320383289 = 11062630^2 + 9931733^2 .

It is a cyclic number.

It is not a de Polignac number, because 221021102900189 - 2²⁴ = 221021086122973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221021102900789) 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, 110510551450094 + 110510551450095.

It is an arithmetic number, because the mean of its divisors is an integer number (110510551450095).

Almost surely, 2^{221021102900189} is an apocalyptic number.

It is an amenable number.

221021102900189 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021102900189 is an equidigital number, since it uses as much as digits as its factorization.

221021102900189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 221021102900189 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred two million, nine hundred thousand, one hundred eighty-nine".