4121985851 has 8 divisors (see below), whose sum is σ = 4239456624. Its totient is φ = 4004834400.

The previous prime is 4121985839. The next prime is 4121985883. The reversal of 4121985851 is 1585891214.

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

It is a cyclic number.

It is not a de Polignac number, because 4121985851 - 2¹⁰ = 4121984827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4121985811) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 53525 + ... + 105398.

It is an arithmetic number, because the mean of its divisors is an integer number (529932078).

Almost surely, 2^4121985851 is an apocalyptic number.

4121985851 is a deficient number, since it is larger than the sum of its proper divisors (117470773).

4121985851 is a wasteful number, since it uses less digits than its factorization.

4121985851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159661.

The product of its digits is 115200, while the sum is 44.

The square root of 4121985851 is about 64202.6934871116. The cubic root of 4121985851 is about 1603.3764441026.

The spelling of 4121985851 in words is "four billion, one hundred twenty-one million, nine hundred eighty-five thousand, eight hundred fifty-one".