213032021 has 8 divisors (see below), whose sum is σ = 216483264. Its totient is φ = 209593440.

The previous prime is 213031991. The next prime is 213032089. The reversal of 213032021 is 120230312.

It is a happy number.

213032021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213032021 - 2¹⁰ = 213030997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213031987 and 213032005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213032221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34265 + ... + 40001.

It is an arithmetic number, because the mean of its divisors is an integer number (27060408).

Almost surely, 2^213032021 is an apocalyptic number.

It is an amenable number.

213032021 is a deficient number, since it is larger than the sum of its proper divisors (3451243).

213032021 is an equidigital number, since it uses as much as digits as its factorization.

213032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 213032021 is about 14595.6164994837. The cubic root of 213032021 is about 597.2391873028.

Adding to 213032021 its reverse (120230312), we get a palindrome (333262333).

The spelling of 213032021 in words is "two hundred thirteen million, thirty-two thousand, twenty-one".