16071121 has 16 divisors (see below), whose sum is σ = 18266688. Its totient is φ = 14011200.

The previous prime is 16071109. The next prime is 16071149. The reversal of 16071121 is 12117061.

It is a cyclic number.

It is not a de Polignac number, because 16071121 - 2⁷ = 16070993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16071151) 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, 28575 + ... + 29131.

It is an arithmetic number, because the mean of its divisors is an integer number (1141668).

Almost surely, 2^16071121 is an apocalyptic number.

16071121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16071121 is a deficient number, since it is larger than the sum of its proper divisors (2195567).

16071121 is a wasteful number, since it uses less digits than its factorization.

16071121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 16071121 is about 4008.8802676059. The cubic root of 16071121 is about 252.3570199896.

Adding to 16071121 its reverse (12117061), we get a palindrome (28188182).

The spelling of 16071121 in words is "sixteen million, seventy-one thousand, one hundred twenty-one".