21331119989 has 2 divisors, whose sum is σ = 21331119990. Its totient is φ = 21331119988.

The previous prime is 21331119973. The next prime is 21331120001. The reversal of 21331119989 is 98991113312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12838023025 + 8493096964 = 113305^2 + 92158^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331119989 - 2⁴ = 21331119973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21331119889) 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, 10665559994 + 10665559995.

It is an arithmetic number, because the mean of its divisors is an integer number (10665559995).

Almost surely, 2^21331119989 is an apocalyptic number.

It is an amenable number.

21331119989 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331119989 is an equidigital number, since it uses as much as digits as its factorization.

21331119989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 47.

The spelling of 21331119989 in words is "twenty-one billion, three hundred thirty-one million, one hundred nineteen thousand, nine hundred eighty-nine".