9910921899 has 4 divisors (see below), whose sum is σ = 13214562536. Its totient is φ = 6607281264.

The previous prime is 9910921871. The next prime is 9910921963. The reversal of 9910921899 is 9981290199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9981290199 = 3 ⋅3327096733.

It is not a de Polignac number, because 9910921899 - 2⁷ = 9910921771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9910921829) 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 3 ways as a sum of consecutive naturals, for example, 1651820314 + ... + 1651820319.

It is an arithmetic number, because the mean of its divisors is an integer number (3303640634).

Almost surely, 2^9910921899 is an apocalyptic number.

9910921899 is a deficient number, since it is larger than the sum of its proper divisors (3303640637).

9910921899 is a wasteful number, since it uses less digits than its factorization.

9910921899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303640636.

The product of its (nonzero) digits is 944784, while the sum is 57.

The square root of 9910921899 is about 99553.6131890752. The cubic root of 9910921899 is about 2148.0185023929.

The spelling of 9910921899 in words is "nine billion, nine hundred ten million, nine hundred twenty-one thousand, eight hundred ninety-nine".