21132304120309 has 2 divisors, whose sum is σ = 21132304120310. Its totient is φ = 21132304120308.

The previous prime is 21132304120253. The next prime is 21132304120321. The reversal of 21132304120309 is 90302140323112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19166271084900 + 1966033035409 = 4377930^2 + 1402153^2 .

It is a cyclic number.

It is not a de Polignac number, because 21132304120309 - 2¹⁵ = 21132304087541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132304121309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566152060154 + 10566152060155.

It is an arithmetic number, because the mean of its divisors is an integer number (10566152060155).

Almost surely, 2^{21132304120309} is an apocalyptic number.

It is an amenable number.

21132304120309 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132304120309 is an equidigital number, since it uses as much as digits as its factorization.

21132304120309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 21132304120309 in words is "twenty-one trillion, one hundred thirty-two billion, three hundred four million, one hundred twenty thousand, three hundred nine".