21233312189 has 2 divisors, whose sum is σ = 21233312190. Its totient is φ = 21233312188.

The previous prime is 21233312179. The next prime is 21233312203. The reversal of 21233312189 is 98121333212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15244100089 + 5989212100 = 123467^2 + 77390^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233312189 - 2²⁸ = 20964876733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233312129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616656094 + 10616656095.

It is an arithmetic number, because the mean of its divisors is an integer number (10616656095).

Almost surely, 2^21233312189 is an apocalyptic number.

It is an amenable number.

21233312189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233312189 is an equidigital number, since it uses as much as digits as its factorization.

21233312189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The spelling of 21233312189 in words is "twenty-one billion, two hundred thirty-three million, three hundred twelve thousand, one hundred eighty-nine".