10221212 has 6 divisors (see below), whose sum is σ = 17887128. Its totient is φ = 5110604.

The previous prime is 10221203. The next prime is 10221247. The reversal of 10221212 is 21212201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 10221193 and 10221202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277648 + ... + 1277655.

It is an arithmetic number, because the mean of its divisors is an integer number (2981188).

Almost surely, 2^10221212 is an apocalyptic number.

It is an amenable number.

10221212 is a deficient number, since it is larger than the sum of its proper divisors (7665916).

10221212 is a wasteful number, since it uses less digits than its factorization.

10221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555307 (or 2555305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 10221212 is about 3197.0630272173. The cubic root of 10221212 is about 217.0205194836.

Adding to 10221212 its reverse (21212201), we get a palindrome (31433413).

The spelling of 10221212 in words is "ten million, two hundred twenty-one thousand, two hundred twelve".