16721112 has 32 divisors (see below), whose sum is σ = 42824880. Its totient is φ = 5437440.

The previous prime is 16721093. The next prime is 16721119. The reversal of 16721112 is 21112761.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7513 + ... + 9480.

Almost surely, 2^16721112 is an apocalyptic number.

16721112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16721112 is an abundant number, since it is smaller than the sum of its proper divisors (26103768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16721112 is a wasteful number, since it uses less digits than its factorization.

16721112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17043 (or 17039 counting only the distinct ones).

The product of its digits is 168, while the sum is 21.

The square root of 16721112 is about 4089.1456320361. The cubic root of 16721112 is about 255.7143216207.

Adding to 16721112 its reverse (21112761), we get a palindrome (37833873).

The spelling of 16721112 in words is "sixteen million, seven hundred twenty-one thousand, one hundred twelve".