21232222189 has 2 divisors, whose sum is σ = 21232222190. Its totient is φ = 21232222188.

The previous prime is 21232222177. The next prime is 21232222241. The reversal of 21232222189 is 98122223212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10926520900 + 10305701289 = 104530^2 + 101517^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232222189 - 2²⁷ = 21098004461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232222169) 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, 10616111094 + 10616111095.

It is an arithmetic number, because the mean of its divisors is an integer number (10616111095).

Almost surely, 2^21232222189 is an apocalyptic number.

It is an amenable number.

21232222189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232222189 is an equidigital number, since it uses as much as digits as its factorization.

21232222189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The spelling of 21232222189 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty-two thousand, one hundred eighty-nine".