212121033 has 8 divisors (see below), whose sum is σ = 283106496. Its totient is φ = 141274800.

The previous prime is 212121031. The next prime is 212121067. The reversal of 212121033 is 330121212.

212121033 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 212121033 - 2¹ = 212121031 is a prime.

It is a super-3 number, since 3×212121033³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212121031) 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, 31198 + ... + 37383.

It is an arithmetic number, because the mean of its divisors is an integer number (35388312).

Almost surely, 2^212121033 is an apocalyptic number.

It is an amenable number.

212121033 is a deficient number, since it is larger than the sum of its proper divisors (70985463).

212121033 is a wasteful number, since it uses less digits than its factorization.

212121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69615.

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

The square root of 212121033 is about 14564.3754757971. The cubic root of 212121033 is about 596.3866470387.

Adding to 212121033 its reverse (330121212), we get a palindrome (542242245).

The spelling of 212121033 in words is "two hundred twelve million, one hundred twenty-one thousand, thirty-three".