210034021 has 16 divisors (see below), whose sum is σ = 223308288. Its totient is φ = 197222400.

The previous prime is 210034007. The next prime is 210034043. The reversal of 210034021 is 120430012.

210034021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 210034021 - 2⁷ = 210033893 is a prime.

It is a super-2 number, since 2×210034021² = 88228579954856882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210033992 and 210034010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210034051) 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, 326326 + ... + 326968.

It is an arithmetic number, because the mean of its divisors is an integer number (13956768).

Almost surely, 2^210034021 is an apocalyptic number.

It is an amenable number.

210034021 is a deficient number, since it is larger than the sum of its proper divisors (13274267).

210034021 is a wasteful number, since it uses less digits than its factorization.

210034021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

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

The square root of 210034021 is about 14492.5505346713. The cubic root of 210034021 is about 594.4242916651.

Adding to 210034021 its reverse (120430012), we get a palindrome (330464033).

The spelling of 210034021 in words is "two hundred ten million, thirty-four thousand, twenty-one".