16313321321 has 16 divisors (see below), whose sum is σ = 19131586560. Its totient is φ = 13750811280.

The previous prime is 16313321293. The next prime is 16313321351. The reversal of 16313321321 is 12312331361.

It is a cyclic number.

It is not a de Polignac number, because 16313321321 - 2¹⁴ = 16313304937 is a prime.

It is a super-2 number, since 2×16313321321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16313321351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 820541 + ... + 840186.

It is an arithmetic number, because the mean of its divisors is an integer number (1195724160).

Almost surely, 2^16313321321 is an apocalyptic number.

16313321321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16313321321 is a deficient number, since it is larger than the sum of its proper divisors (2818265239).

16313321321 is a wasteful number, since it uses less digits than its factorization.

16313321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660804.

The product of its digits is 1944, while the sum is 26.

Adding to 16313321321 its reverse (12312331361), we get a palindrome (28625652682).

The spelling of 16313321321 in words is "sixteen billion, three hundred thirteen million, three hundred twenty-one thousand, three hundred twenty-one".