212033221 has 2 divisors, whose sum is σ = 212033222. Its totient is φ = 212033220.

The previous prime is 212033203. The next prime is 212033243. The reversal of 212033221 is 122330212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210569121 + 1464100 = 14511^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 212033221 - 2¹¹ = 212031173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212033195 and 212033204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212093221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106016610 + 106016611.

It is an arithmetic number, because the mean of its divisors is an integer number (106016611).

Almost surely, 2^212033221 is an apocalyptic number.

It is an amenable number.

212033221 is a deficient number, since it is larger than the sum of its proper divisors (1).

212033221 is an equidigital number, since it uses as much as digits as its factorization.

212033221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 212033221 is about 14561.3605476961. The cubic root of 212033221 is about 596.3043400467.

Adding to 212033221 its reverse (122330212), we get a palindrome (334363433).

The spelling of 212033221 in words is "two hundred twelve million, thirty-three thousand, two hundred twenty-one".