221012221022189 has 2 divisors, whose sum is σ = 221012221022190. Its totient is φ = 221012221022188.

The previous prime is 221012221022183. The next prime is 221012221022249. The reversal of 221012221022189 is 981220122210122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180736887720964 + 40275333301225 = 13443842^2 + 6346285^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012221022189 - 2³² = 221007926054893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012221022183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506110511094 + 110506110511095.

It is an arithmetic number, because the mean of its divisors is an integer number (110506110511095).

Almost surely, 2^{221012221022189} is an apocalyptic number.

It is an amenable number.

221012221022189 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012221022189 is an equidigital number, since it uses as much as digits as its factorization.

221012221022189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 221012221022189 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, twenty-two thousand, one hundred eighty-nine".