212012133 has 4 divisors (see below), whose sum is σ = 282682848. Its totient is φ = 141341420.

The previous prime is 212012123. The next prime is 212012197. The reversal of 212012133 is 331210212.

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 212012133 - 2⁹ = 212011621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012123) 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, 35335353 + ... + 35335358.

It is an arithmetic number, because the mean of its divisors is an integer number (70670712).

Almost surely, 2^212012133 is an apocalyptic number.

It is an amenable number.

212012133 is a deficient number, since it is larger than the sum of its proper divisors (70670715).

212012133 is an equidigital number, since it uses as much as digits as its factorization.

212012133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70670714.

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

The square root of 212012133 is about 14560.6364215305. The cubic root of 212012133 is about 596.2845706874.

Adding to 212012133 its reverse (331210212), we get a palindrome (543222345).

The spelling of 212012133 in words is "two hundred twelve million, twelve thousand, one hundred thirty-three".