16080121 has 4 divisors (see below), whose sum is σ = 16096500. Its totient is φ = 16063744.

The previous prime is 16080049. The next prime is 16080139. The reversal of 16080121 is 12108061.

16080121 = 2835² + 2836².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12108061 = 7 ⋅1729723.

It can be written as a sum of positive squares in 2 ways, for example, as 8037225 + 8042896 = 2835^2 + 2836^2 .

It is a cyclic number.

It is not a de Polignac number, because 16080121 - 2⁷ = 16079993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16080161) 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, 6616 + ... + 8713.

It is an arithmetic number, because the mean of its divisors is an integer number (4024125).

Almost surely, 2^16080121 is an apocalyptic number.

16080121 is the 2836-th centered square number.

It is an amenable number.

16080121 is a deficient number, since it is larger than the sum of its proper divisors (16379).

16080121 is a wasteful number, since it uses less digits than its factorization.

16080121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16378.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 16080121 is about 4010.0026184530. The cubic root of 16080121 is about 252.4041187440.

Adding to 16080121 its reverse (12108061), we get a palindrome (28188182).

The spelling of 16080121 in words is "sixteen million, eighty thousand, one hundred twenty-one".