212034021 has 4 divisors (see below), whose sum is σ = 282712032. Its totient is φ = 141356012.

The previous prime is 212033999. The next prime is 212034037. The reversal of 212034021 is 120430212.

212034021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212034021 - 2¹³ = 212025829 is a prime.

It is a super-2 number, since 2×212034021² = 89916852122856882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212034521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35339001 + ... + 35339006.

It is an arithmetic number, because the mean of its divisors is an integer number (70678008).

Almost surely, 2^212034021 is an apocalyptic number.

It is an amenable number.

212034021 is a deficient number, since it is larger than the sum of its proper divisors (70678011).

212034021 is an equidigital number, since it uses as much as digits as its factorization.

212034021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70678010.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212034021 is about 14561.3880176307. The cubic root of 212034021 is about 596.3050899966.

Adding to 212034021 its reverse (120430212), we get a palindrome (332464233).

The spelling of 212034021 in words is "two hundred twelve million, thirty-four thousand, twenty-one".