16321232031331 has 2 divisors, whose sum is σ = 16321232031332. Its totient is φ = 16321232031330.

The previous prime is 16321232031323. The next prime is 16321232031407. The reversal of 16321232031331 is 13313023212361.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13313023212361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16321232031331 - 2³ = 16321232031323 is a prime.

It is a super-2 number, since 2×16321232031331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16321232031293 and 16321232031302.

It is not a weakly prime, because it can be changed into another prime (16321232031131) 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, 8160616015665 + 8160616015666.

It is an arithmetic number, because the mean of its divisors is an integer number (8160616015666).

Almost surely, 2^{16321232031331} is an apocalyptic number.

16321232031331 is a deficient number, since it is larger than the sum of its proper divisors (1).

16321232031331 is an equidigital number, since it uses as much as digits as its factorization.

16321232031331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 31.

Adding to 16321232031331 its reverse (13313023212361), we get a palindrome (29634255243692).

The spelling of 16321232031331 in words is "sixteen trillion, three hundred twenty-one billion, two hundred thirty-two million, thirty-one thousand, three hundred thirty-one".