16642312601321 has 16 divisors (see below), whose sum is σ = 18741148070400. Its totient is φ = 14641139539200.

The previous prime is 16642312601303. The next prime is 16642312601347. The reversal of 16642312601321 is 12310621324661.

It is a cyclic number.

It is not a de Polignac number, because 16642312601321 - 2¹⁰ = 16642312600297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16642312601351) 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, 30077915 + ... + 30626223.

It is an arithmetic number, because the mean of its divisors is an integer number (1171321754400).

Almost surely, 2^{16642312601321} is an apocalyptic number.

16642312601321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16642312601321 is a deficient number, since it is larger than the sum of its proper divisors (2098835469079).

16642312601321 is a wasteful number, since it uses less digits than its factorization.

16642312601321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637360.

The product of its (nonzero) digits is 62208, while the sum is 38.

Adding to 16642312601321 its reverse (12310621324661), we get a palindrome (28952933925982).

The spelling of 16642312601321 in words is "sixteen trillion, six hundred forty-two billion, three hundred twelve million, six hundred one thousand, three hundred twenty-one".