21120101222189 has 2 divisors, whose sum is σ = 21120101222190. Its totient is φ = 21120101222188.

The previous prime is 21120101222153. The next prime is 21120101222219. The reversal of 21120101222189 is 98122210102112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11475766008100 + 9644335214089 = 3387590^2 + 3105533^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120101222189 - 2⁴⁰ = 20020589594413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120101222119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560050611094 + 10560050611095.

It is an arithmetic number, because the mean of its divisors is an integer number (10560050611095).

Almost surely, 2^{21120101222189} is an apocalyptic number.

It is an amenable number.

21120101222189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120101222189 is an equidigital number, since it uses as much as digits as its factorization.

21120101222189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The spelling of 21120101222189 in words is "twenty-one trillion, one hundred twenty billion, one hundred one million, two hundred twenty-two thousand, one hundred eighty-nine".