120065821 has 4 divisors (see below), whose sum is σ = 123938944. Its totient is φ = 116192700.

The previous prime is 120065797. The next prime is 120065857. The reversal of 120065821 is 128560021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120065821 - 2¹⁹ = 119541533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120065321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936515 + ... + 1936576.

It is an arithmetic number, because the mean of its divisors is an integer number (30984736).

Almost surely, 2^120065821 is an apocalyptic number.

It is an amenable number.

120065821 is a deficient number, since it is larger than the sum of its proper divisors (3873123).

120065821 is an equidigital number, since it uses as much as digits as its factorization.

120065821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873122.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 120065821 is about 10957.4550421163. The cubic root of 120065821 is about 493.3325809075.

The spelling of 120065821 in words is "one hundred twenty million, sixty-five thousand, eight hundred twenty-one".