16051329100921 has 3 divisors (see below), whose sum is σ = 16051333107333. Its totient is φ = 16051325094510.

The previous prime is 16051329100913. The next prime is 16051329100927. The reversal of 16051329100921 is 12900192315061.

The square root of 16051329100921 is 4006411.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 16051329100921 - 2³ = 16051329100913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16051329100927) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2003206 + ... + 6009616.

It is an arithmetic number, because the mean of its divisors is an integer number (5350444369111).

Almost surely, 2^{16051329100921} is an apocalyptic number.

16051329100921 is the 4006411-st square number.

16051329100921 is the 2003206-th centered octagonal number.

It is an amenable number.

16051329100921 is a deficient number, since it is larger than the sum of its proper divisors (4006412).

16051329100921 is an frugal number, since it uses more digits than its factorization.

16051329100921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8012822 (or 4006411 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 40.

The spelling of 16051329100921 in words is "sixteen trillion, fifty-one billion, three hundred twenty-nine million, one hundred thousand, nine hundred twenty-one".