16522121 has 16 divisors (see below), whose sum is σ = 20711040. Its totient is φ = 12804480.

The previous prime is 16522117. The next prime is 16522123. The reversal of 16522121 is 12122561.

It is a cyclic number.

It is not a de Polignac number, because 16522121 - 2² = 16522117 is a prime.

16522121 is a modest number, since divided by 2121 gives 1652 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 16522093 and 16522102.

It is not an unprimeable number, because it can be changed into a prime (16522123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17165 + ... + 18101.

It is an arithmetic number, because the mean of its divisors is an integer number (1294440).

Almost surely, 2^16522121 is an apocalyptic number.

16522121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16522121 is a deficient number, since it is larger than the sum of its proper divisors (4188919).

16522121 is a wasteful number, since it uses less digits than its factorization.

16522121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its digits is 240, while the sum is 20.

The square root of 16522121 is about 4064.7411971736. The cubic root of 16522121 is about 254.6958876207.

Adding to 16522121 its reverse (12122561), we get a palindrome (28644682).

It can be divided in two parts, 1652 and 2121, that added together give a palindrome (3773).

The spelling of 16522121 in words is "sixteen million, five hundred twenty-two thousand, one hundred twenty-one".