21331566152291 has 2 divisors, whose sum is σ = 21331566152292. Its totient is φ = 21331566152290.

The previous prime is 21331566152279. The next prime is 21331566152317. The reversal of 21331566152291 is 19225166513312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21331566152291 - 2¹⁰ = 21331566151267 is a prime.

It is a super-3 number, since 3×21331566152291³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21331566122291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665783076145 + 10665783076146.

It is an arithmetic number, because the mean of its divisors is an integer number (10665783076146).

Almost surely, 2^{21331566152291} is an apocalyptic number.

21331566152291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331566152291 is an equidigital number, since it uses as much as digits as its factorization.

21331566152291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 47.

The spelling of 21331566152291 in words is "twenty-one trillion, three hundred thirty-one billion, five hundred sixty-six million, one hundred fifty-two thousand, two hundred ninety-one".