120003021 has 12 divisors (see below), whose sum is σ = 175713148. Its totient is φ = 78905664.

The previous prime is 120003011. The next prime is 120003053. The reversal of 120003021 is 120300021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 101727396 + 18275625 = 10086^2 + 4275^2 .

It is not a de Polignac number, because 120003021 - 2¹⁴ = 119986637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120002994 and 120003012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120003001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90670 + ... + 91983.

Almost surely, 2^120003021 is an apocalyptic number.

It is an amenable number.

120003021 is a deficient number, since it is larger than the sum of its proper divisors (55710127).

120003021 is a wasteful number, since it uses less digits than its factorization.

120003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182732 (or 182729 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 120003021 is about 10954.5890383893. The cubic root of 120003021 is about 493.2465539573.

Adding to 120003021 its reverse (120300021), we get a palindrome (240303042).

The spelling of 120003021 in words is "one hundred twenty million, three thousand, twenty-one".