120040021 has 4 divisors (see below), whose sum is σ = 122594112. Its totient is φ = 117485932.

The previous prime is 120040003. The next prime is 120040027.

120040021 is nontrivially palindromic in base 10.

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 a de Polignac number, because none of the positive numbers 2^k-120040021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120040027) 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, 1276975 + ... + 1277068.

It is an arithmetic number, because the mean of its divisors is an integer number (30648528).

Almost surely, 2^120040021 is an apocalyptic number.

It is an amenable number.

120040021 is a deficient number, since it is larger than the sum of its proper divisors (2554091).

120040021 is an equidigital number, since it uses as much as digits as its factorization.

120040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554090.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 120040021 is about 10956.2776981966. The cubic root of 120040021 is about 493.2972422567.

The spelling of 120040021 in words is "one hundred twenty million, forty thousand, twenty-one".