120321021 has 4 divisors (see below), whose sum is σ = 160428032. Its totient is φ = 80214012.

The previous prime is 120321007. The next prime is 120321037. The reversal of 120321021 is 120123021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120123021 = 3 ⋅40041007.

It is not a de Polignac number, because 120321021 - 2⁶ = 120320957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120320988 and 120321006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120329021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20053501 + ... + 20053506.

It is an arithmetic number, because the mean of its divisors is an integer number (40107008).

Almost surely, 2^120321021 is an apocalyptic number.

It is an amenable number.

120321021 is a deficient number, since it is larger than the sum of its proper divisors (40107011).

120321021 is an equidigital number, since it uses as much as digits as its factorization.

120321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40107010.

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

The square root of 120321021 is about 10969.0939005918. The cubic root of 120321021 is about 493.6818598271.

Adding to 120321021 its reverse (120123021), we get a palindrome (240444042).

The spelling of 120321021 in words is "one hundred twenty million, three hundred twenty-one thousand, twenty-one".