120021015 has 16 divisors (see below), whose sum is σ = 200383488. Its totient is φ = 61227936.

The previous prime is 120020993. The next prime is 120021017. The reversal of 120021015 is 510120021.

It is not a de Polignac number, because 120021015 - 2¹¹ = 120018967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021017) 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 15 ways as a sum of consecutive naturals, for example, 173599 + ... + 174288.

It is an arithmetic number, because the mean of its divisors is an integer number (12523968).

Almost surely, 2^120021015 is an apocalyptic number.

120021015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120021015 is a deficient number, since it is larger than the sum of its proper divisors (80362473).

120021015 is a wasteful number, since it uses less digits than its factorization.

120021015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347918.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 120021015 is about 10955.4103072409. The cubic root of 120021015 is about 493.2712062114.

Adding to 120021015 its reverse (510120021), we get a palindrome (630141036).

The spelling of 120021015 in words is "one hundred twenty million, twenty-one thousand, fifteen".