212120033 has 4 divisors (see below), whose sum is σ = 224597700. Its totient is φ = 199642368.

The previous prime is 212120023. The next prime is 212120039. The reversal of 212120033 is 330021212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153933649 + 58186384 = 12407^2 + 7628^2 .

It is a cyclic number.

It is not a de Polignac number, because 212120033 - 2⁴ = 212120017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6238808 + ... + 6238841.

It is an arithmetic number, because the mean of its divisors is an integer number (56149425).

Almost surely, 2^212120033 is an apocalyptic number.

It is an amenable number.

212120033 is a deficient number, since it is larger than the sum of its proper divisors (12477667).

212120033 is a wasteful number, since it uses less digits than its factorization.

212120033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12477666.

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

The square root of 212120033 is about 14564.3411454140. The cubic root of 212120033 is about 596.3857098574.

Adding to 212120033 its reverse (330021212), we get a palindrome (542141245).

The spelling of 212120033 in words is "two hundred twelve million, one hundred twenty thousand, thirty-three".