21160132423321 has 2 divisors, whose sum is σ = 21160132423322. Its totient is φ = 21160132423320.

The previous prime is 21160132423319. The next prime is 21160132423327. The reversal of 21160132423321 is 12332423106112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15808289729296 + 5351842694025 = 3975964^2 + 2313405^2 .

It is a cyclic number.

It is not a de Polignac number, because 21160132423321 - 2¹ = 21160132423319 is a prime.

Together with 21160132423319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21160132423327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580066211660 + 10580066211661.

It is an arithmetic number, because the mean of its divisors is an integer number (10580066211661).

Almost surely, 2^{21160132423321} is an apocalyptic number.

It is an amenable number.

21160132423321 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160132423321 is an equidigital number, since it uses as much as digits as its factorization.

21160132423321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 21160132423321 its reverse (12332423106112), we get a palindrome (33492555529433).

The spelling of 21160132423321 in words is "twenty-one trillion, one hundred sixty billion, one hundred thirty-two million, four hundred twenty-three thousand, three hundred twenty-one".