9912112221 has 8 divisors (see below), whose sum is σ = 14417617824. Its totient is φ = 6007340720.

The previous prime is 9912112213. The next prime is 9912112253. The reversal of 9912112221 is 1222112199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9912112221 - 2³ = 9912112213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9912112201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150183486 + ... + 150183551.

It is an arithmetic number, because the mean of its divisors is an integer number (1802202228).

Almost surely, 2^9912112221 is an apocalyptic number.

It is an amenable number.

9912112221 is a deficient number, since it is larger than the sum of its proper divisors (4505505603).

9912112221 is a wasteful number, since it uses less digits than its factorization.

9912112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300367051.

The product of its digits is 1296, while the sum is 30.

The square root of 9912112221 is about 99559.5913059109. The cubic root of 9912112221 is about 2148.1044927563.

The spelling of 9912112221 in words is "nine billion, nine hundred twelve million, one hundred twelve thousand, two hundred twenty-one".