16121105 has 32 divisors (see below), whose sum is σ = 25982208. Its totient is φ = 9273600.

The previous prime is 16121099. The next prime is 16121107. The reversal of 16121105 is 50112161.

It is not a de Polignac number, because 16121105 - 2⁴ = 16121089 is a prime.

It is a Curzon number.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (16121107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3395 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (811944).

Almost surely, 2^16121105 is an apocalyptic number.

It is an amenable number.

16121105 is a deficient number, since it is larger than the sum of its proper divisors (9861103).

16121105 is a wasteful number, since it uses less digits than its factorization.

16121105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 16121105 is about 4015.1095875455. The cubic root of 16121105 is about 252.6183740623.

Adding to 16121105 its reverse (50112161), we get a palindrome (66233266).

It can be divided in two parts, 16 and 121105, that added together give a palindrome (121121).

The spelling of 16121105 in words is "sixteen million, one hundred twenty-one thousand, one hundred five".