9121289216 has 176 divisors, whose sum is σ = 21172988928. Its totient is φ = 3896893440.

The previous prime is 9121289209. The next prime is 9121289237. The reversal of 9121289216 is 6129821219.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294235121 + ... + 294235151.

Almost surely, 2^9121289216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9121289216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10586494464).

9121289216 is an abundant number, since it is smaller than the sum of its proper divisors (12051699712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9121289216 is an equidigital number, since it uses as much as digits as its factorization.

9121289216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 69 counting only the distinct ones).

The product of its digits is 31104, while the sum is 41.

The square root of 9121289216 is about 95505.4407664820. The cubic root of 9121289216 is about 2089.3862972272.

The spelling of 9121289216 in words is "nine billion, one hundred twenty-one million, two hundred eighty-nine thousand, two hundred sixteen".