120010021 has 16 divisors (see below), whose sum is σ = 136885248. Its totient is φ = 104544000.

The previous prime is 120010019. The next prime is 120010027.

120010021 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 120010021 - 2¹ = 120010019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120009986 and 120010013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120010027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7171 + ... + 17071.

It is an arithmetic number, because the mean of its divisors is an integer number (8555328).

Almost surely, 2^120010021 is an apocalyptic number.

It is an amenable number.

120010021 is a deficient number, since it is larger than the sum of its proper divisors (16875227).

120010021 is a wasteful number, since it uses less digits than its factorization.

120010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9972.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 120010021 is about 10954.9085345337. The cubic root of 120010021 is about 493.2561444346.

The spelling of 120010021 in words is "one hundred twenty million, ten thousand, twenty-one".