120015921 has 8 divisors (see below), whose sum is σ = 160164864. Its totient is φ = 79938800.

The previous prime is 120015919. The next prime is 120015941. The reversal of 120015921 is 129510021.

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 120015921 - 2¹ = 120015919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120015941) 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 7 ways as a sum of consecutive naturals, for example, 13926 + ... + 20831.

It is an arithmetic number, because the mean of its divisors is an integer number (20020608).

Almost surely, 2^120015921 is an apocalyptic number.

It is an amenable number.

120015921 is a deficient number, since it is larger than the sum of its proper divisors (40148943).

120015921 is a wasteful number, since it uses less digits than its factorization.

120015921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35911.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 120015921 is about 10955.1778169047. The cubic root of 120015921 is about 493.2642275473.

Adding to 120015921 its reverse (129510021), we get a palindrome (249525942).

The spelling of 120015921 in words is "one hundred twenty million, fifteen thousand, nine hundred twenty-one".