16836121 has 2 divisors, whose sum is σ = 16836122. Its totient is φ = 16836120.

The previous prime is 16836119. The next prime is 16836133. The reversal of 16836121 is 12163861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 876096 = 3995^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 16836121 - 2¹ = 16836119 is a prime.

Together with 16836119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16836121.

It is not a weakly prime, because it can be changed into another prime (16836151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8418060 + 8418061.

It is an arithmetic number, because the mean of its divisors is an integer number (8418061).

Almost surely, 2^16836121 is an apocalyptic number.

It is an amenable number.

16836121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16836121 is an equidigital number, since it uses as much as digits as its factorization.

16836121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 16836121 is about 4103.1842512858. The cubic root of 16836121 is about 256.2992563652.

Adding to 16836121 its reverse (12163861), we get a palindrome (28999982).

The spelling of 16836121 in words is "sixteen million, eight hundred thirty-six thousand, one hundred twenty-one".