120030021 has 6 divisors (see below), whose sum is σ = 173376710. Its totient is φ = 80020008.

The previous prime is 120030019. The next prime is 120030041.

It is a happy number.

120030021 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 119049921 + 980100 = 10911^2 + 990^2 .

It is not a de Polignac number, because 120030021 - 2¹ = 120030019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 13336669 = 120030021 / (1 + 2 + 0 + 0 + 3 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120029985 and 120030012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120030041) 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 5 ways as a sum of consecutive naturals, for example, 6668326 + ... + 6668343.

Almost surely, 2^120030021 is an apocalyptic number.

It is an amenable number.

120030021 is a deficient number, since it is larger than the sum of its proper divisors (53346689).

120030021 is a wasteful number, since it uses less digits than its factorization.

120030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13336675 (or 13336672 counting only the distinct ones).

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

The square root of 120030021 is about 10955.8213293208. The cubic root of 120030021 is about 493.2835437435.

The spelling of 120030021 in words is "one hundred twenty million, thirty thousand, twenty-one".