16000121 has 2 divisors, whose sum is σ = 16000122. Its totient is φ = 16000120.

The previous prime is 16000097. The next prime is 16000129. The reversal of 16000121 is 12100061.

16000121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 121 = 4000^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 16000121 - 2⁶ = 16000057 is a prime.

It is not a weakly prime, because it can be changed into another prime (16000129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8000060 + 8000061.

It is an arithmetic number, because the mean of its divisors is an integer number (8000061).

Almost surely, 2^16000121 is an apocalyptic number.

It is an amenable number.

16000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16000121 is an equidigital number, since it uses as much as digits as its factorization.

16000121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 16000121 is about 4000.0151249714. The cubic root of 16000121 is about 251.9848451876.

Adding to 16000121 its reverse (12100061), we get a palindrome (28100182).

The spelling of 16000121 in words is "sixteen million, one hundred twenty-one", and thus it is an aban number.