9900990122 has 16 divisors (see below), whose sum is σ = 14973057792. Its totient is φ = 4910100720.

The previous prime is 9900990109. The next prime is 9900990139. The reversal of 9900990122 is 2210990099.

It is a self number, because there is not a number n which added to its sum of digits gives 9900990122.

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, 121823 + ... + 186125.

It is an arithmetic number, because the mean of its divisors is an integer number (935816112).

Almost surely, 2^9900990122 is an apocalyptic number.

9900990122 is a deficient number, since it is larger than the sum of its proper divisors (5072067670).

9900990122 is a wasteful number, since it uses less digits than its factorization.

9900990122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64933.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 9900990122 is about 99503.7191365227. The cubic root of 9900990122 is about 2147.3007497586.

The spelling of 9900990122 in words is "nine billion, nine hundred million, nine hundred ninety thousand, one hundred twenty-two".