91122212 has 12 divisors (see below), whose sum is σ = 159887280. Its totient is φ = 45440136.

The previous prime is 91122191. The next prime is 91122217. The reversal of 91122212 is 21222119.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91122217) 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, 28538 + ... + 31569.

It is an arithmetic number, because the mean of its divisors is an integer number (13323940).

Almost surely, 2^91122212 is an apocalyptic number.

It is an amenable number.

91122212 is a deficient number, since it is larger than the sum of its proper divisors (68765068).

91122212 is a wasteful number, since it uses less digits than its factorization.

91122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60490 (or 60488 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The square root of 91122212 is about 9545.7955142565. The cubic root of 91122212 is about 449.9954106528.

The spelling of 91122212 in words is "ninety-one million, one hundred twenty-two thousand, two hundred twelve".