21331310231323 has 2 divisors, whose sum is σ = 21331310231324. Its totient is φ = 21331310231322.

The previous prime is 21331310231269. The next prime is 21331310231327. The reversal of 21331310231323 is 32313201313312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21331310231323 - 2¹³ = 21331310223131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21331310231291 and 21331310231300.

It is not a weakly prime, because it can be changed into another prime (21331310231327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665655115661 + 10665655115662.

It is an arithmetic number, because the mean of its divisors is an integer number (10665655115662).

Almost surely, 2^{21331310231323} is an apocalyptic number.

21331310231323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331310231323 is an equidigital number, since it uses as much as digits as its factorization.

21331310231323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21331310231323 its reverse (32313201313312), we get a palindrome (53644511544635).

The spelling of 21331310231323 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred ten million, two hundred thirty-one thousand, three hundred twenty-three".