120340021 has 8 divisors (see below), whose sum is σ = 123756120. Its totient is φ = 116932608.

The previous prime is 120339983. The next prime is 120340027. The reversal of 120340021 is 120043021.

It can be written as a sum of positive squares in 4 ways, for example, as 65431921 + 54908100 = 8089^2 + 7410^2 .

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 120340021 - 2⁷ = 120339893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120339983 and 120340010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120340027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34485 + ... + 37813.

It is an arithmetic number, because the mean of its divisors is an integer number (15469515).

Almost surely, 2^120340021 is an apocalyptic number.

It is an amenable number.

120340021 is a deficient number, since it is larger than the sum of its proper divisors (3416099).

120340021 is an equidigital number, since it uses as much as digits as its factorization.

120340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 120340021 is about 10969.9599361164. The cubic root of 120340021 is about 493.7078443740.

Adding to 120340021 its reverse (120043021), we get a palindrome (240383042).

The spelling of 120340021 in words is "one hundred twenty million, three hundred forty thousand, twenty-one".