8999121022 has 16 divisors (see below), whose sum is σ = 13988660400. Its totient is φ = 4336778880.

The previous prime is 8999121017. The next prime is 8999121073. The reversal of 8999121022 is 2201219998.

It is a self number, because there is not a number n which added to its sum of digits gives 8999121022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102747 + ... + 168982.

It is an arithmetic number, because the mean of its divisors is an integer number (874291275).

Almost surely, 2^8999121022 is an apocalyptic number.

8999121022 is a deficient number, since it is larger than the sum of its proper divisors (4989539378).

8999121022 is a wasteful number, since it uses less digits than its factorization.

8999121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272331.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 8999121022 is about 94863.6970711136. The cubic root of 8999121022 is about 2080.0161042577.

The spelling of 8999121022 in words is "eight billion, nine hundred ninety-nine million, one hundred twenty-one thousand, twenty-two".