9021212 has 6 divisors (see below), whose sum is σ = 15787128. Its totient is φ = 4510604.

The previous prime is 9021211. The next prime is 9021223. The reversal of 9021212 is 2121209.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127648 + ... + 1127655.

It is an arithmetic number, because the mean of its divisors is an integer number (2631188).

Almost surely, 2^9021212 is an apocalyptic number.

It is an amenable number.

9021212 is a deficient number, since it is larger than the sum of its proper divisors (6765916).

9021212 is a wasteful number, since it uses less digits than its factorization.

9021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255307 (or 2255305 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 9021212 is about 3003.5332526876. The cubic root of 9021212 is about 208.1716716357.

The spelling of 9021212 in words is "nine million, twenty-one thousand, two hundred twelve".