9113311221 has 32 divisors (see below), whose sum is σ = 14625008640. Its totient is φ = 4931103744.

The previous prime is 9113311217. The next prime is 9113311223. The reversal of 9113311221 is 1221133119.

9113311221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9113311221 - 2² = 9113311217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9113311191 and 9113311200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9113311223) 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 31 ways as a sum of consecutive naturals, for example, 1066261 + ... + 1074773.

It is an arithmetic number, because the mean of its divisors is an integer number (457031520).

Almost surely, 2^9113311221 is an apocalyptic number.

It is an amenable number.

9113311221 is a deficient number, since it is larger than the sum of its proper divisors (5511697419).

9113311221 is a wasteful number, since it uses less digits than its factorization.

9113311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11225.

The product of its digits is 324, while the sum is 24.

The square root of 9113311221 is about 95463.6644016979. The cubic root of 9113311221 is about 2088.7769544279.

The spelling of 9113311221 in words is "nine billion, one hundred thirteen million, three hundred eleven thousand, two hundred twenty-one".