4099784121 has 24 divisors (see below), whose sum is σ = 5981399424. Its totient is φ = 2705870880.

The previous prime is 4099784083. The next prime is 4099784137. The reversal of 4099784121 is 1214879904.

It is a happy number.

It is not a de Polignac number, because 4099784121 - 2⁶ = 4099784057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4099784921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364240 + ... + 375326.

It is an arithmetic number, because the mean of its divisors is an integer number (249224976).

Almost surely, 2^4099784121 is an apocalyptic number.

It is an amenable number.

4099784121 is a deficient number, since it is larger than the sum of its proper divisors (1881615303).

4099784121 is a wasteful number, since it uses less digits than its factorization.

4099784121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11501 (or 11498 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 4099784121 is about 64029.5566203609. The cubic root of 4099784121 is about 1600.4925724307.

The spelling of 4099784121 in words is "four billion, ninety-nine million, seven hundred eighty-four thousand, one hundred twenty-one".