212133021 has 8 divisors (see below), whose sum is σ = 299481984. Its totient is φ = 133103040.

The previous prime is 212133017. The next prime is 212133029. The reversal of 212133021 is 120331212.

212133021 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 not a de Polignac number, because 212133021 - 2² = 212133017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212133029) 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, 2079685 + ... + 2079786.

It is an arithmetic number, because the mean of its divisors is an integer number (37435248).

Almost surely, 2^212133021 is an apocalyptic number.

It is an amenable number.

212133021 is a deficient number, since it is larger than the sum of its proper divisors (87348963).

212133021 is a wasteful number, since it uses less digits than its factorization.

212133021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159491.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 212133021 is about 14564.7870221298. The cubic root of 212133021 is about 596.3978817386.

Adding to 212133021 its reverse (120331212), we get a palindrome (332464233).

The spelling of 212133021 in words is "two hundred twelve million, one hundred thirty-three thousand, twenty-one".