16109903121 has 8 divisors (see below), whose sum is σ = 23132168640. Its totient is φ = 9913786512.

The previous prime is 16109903099. The next prime is 16109903123. The reversal of 16109903121 is 12130990161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-16109903121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16109903123) 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, 206537181 + ... + 206537258.

It is an arithmetic number, because the mean of its divisors is an integer number (2891521080).

Almost surely, 2^16109903121 is an apocalyptic number.

It is an amenable number.

16109903121 is a deficient number, since it is larger than the sum of its proper divisors (7022265519).

16109903121 is a wasteful number, since it uses less digits than its factorization.

16109903121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413074455.

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 16109903121 in words is "sixteen billion, one hundred nine million, nine hundred three thousand, one hundred twenty-one".