120331021 has 4 divisors (see below), whose sum is σ = 120361600. Its totient is φ = 120300444.

The previous prime is 120330997. The next prime is 120331039. The reversal of 120331021 is 120133021.

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 120331021 - 2⁵ = 120330989 is a prime.

It is a super-2 number, since 2×120331021² = 28959109229804882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120330992 and 120331010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120331091) 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, 8331 + ... + 17608.

It is an arithmetic number, because the mean of its divisors is an integer number (30090400).

Almost surely, 2^120331021 is an apocalyptic number.

It is an amenable number.

120331021 is a deficient number, since it is larger than the sum of its proper divisors (30579).

120331021 is an equidigital number, since it uses as much as digits as its factorization.

120331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30578.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 120331021 is about 10969.5497172856. The cubic root of 120331021 is about 493.6955362454.

Adding to 120331021 its reverse (120133021), we get a palindrome (240464042).

The spelling of 120331021 in words is "one hundred twenty million, three hundred thirty-one thousand, twenty-one".