16051121 has 4 divisors (see below), whose sum is σ = 16244592. Its totient is φ = 15857652.

The previous prime is 16051097. The next prime is 16051129. The reversal of 16051121 is 12115061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12115061 = 7 ⋅1730723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16051121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16051121.

It is not an unprimeable number, because it can be changed into a prime (16051129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96611 + ... + 96776.

It is an arithmetic number, because the mean of its divisors is an integer number (4061148).

Almost surely, 2^16051121 is an apocalyptic number.

It is an amenable number.

16051121 is a deficient number, since it is larger than the sum of its proper divisors (193471).

16051121 is an equidigital number, since it uses as much as digits as its factorization.

16051121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193470.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 16051121 is about 4006.3850289257. The cubic root of 16051121 is about 252.2522931006.

Adding to 16051121 its reverse (12115061), we get a palindrome (28166182).

The spelling of 16051121 in words is "sixteen million, fifty-one thousand, one hundred twenty-one".