120021321 has 16 divisors (see below), whose sum is σ = 185621504. Its totient is φ = 67559184.

The previous prime is 120021289. The next prime is 120021323. The reversal of 120021321 is 123120021.

It is not a de Polignac number, because 120021321 - 2⁵ = 120021289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120021297 and 120021306.

It is not an unprimeable number, because it can be changed into a prime (120021323) 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, 41245 + ... + 44058.

It is an arithmetic number, because the mean of its divisors is an integer number (11601344).

Almost surely, 2^120021321 is an apocalyptic number.

It is an amenable number.

120021321 is a deficient number, since it is larger than the sum of its proper divisors (65600183).

120021321 is an equidigital number, since it uses as much as digits as its factorization.

120021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85380.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 120021321 is about 10955.4242729344. The cubic root of 120021321 is about 493.2716254182.

Adding to 120021321 its reverse (123120021), we get a palindrome (243141342).

The spelling of 120021321 in words is "one hundred twenty million, twenty-one thousand, three hundred twenty-one".