203221212 has 24 divisors (see below), whose sum is σ = 490534800. Its totient is φ = 65404416.

The previous prime is 203221211. The next prime is 203221223. The reversal of 203221212 is 212122302.

It is a happy number.

203221212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×203221212² = 82597722013497888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203221191 and 203221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203221211) 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, 291637 + ... + 292332.

It is an arithmetic number, because the mean of its divisors is an integer number (20438950).

Almost surely, 2^203221212 is an apocalyptic number.

It is an amenable number.

203221212 is an abundant number, since it is smaller than the sum of its proper divisors (287313588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203221212 is a wasteful number, since it uses less digits than its factorization.

203221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584005 (or 584003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 203221212 is about 14255.5677543899. The cubic root of 203221212 is about 587.9264681986.

Adding to 203221212 its reverse (212122302), we get a palindrome (415343514).

The spelling of 203221212 in words is "two hundred three million, two hundred twenty-one thousand, two hundred twelve".