16121115 has 24 divisors (see below), whose sum is σ = 28227888. Its totient is φ = 8510400.

The previous prime is 16121107. The next prime is 16121143. The reversal of 16121115 is 51112161.

It is a happy number.

It is not a de Polignac number, because 16121115 - 2³ = 16121107 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2772 + ... + 6318.

It is an arithmetic number, because the mean of its divisors is an integer number (1176162).

Almost surely, 2^16121115 is an apocalyptic number.

16121115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16121115 is a deficient number, since it is larger than the sum of its proper divisors (12106773).

16121115 is a wasteful number, since it uses less digits than its factorization.

16121115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659 (or 3656 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 16121115 is about 4015.1108328414. The cubic root of 16121115 is about 252.6184262958.

Adding to 16121115 its reverse (51112161), we get a palindrome (67233276).

The spelling of 16121115 in words is "sixteen million, one hundred twenty-one thousand, one hundred fifteen".