9902111111 has 4 divisors (see below), whose sum is σ = 9902587992. Its totient is φ = 9901634232.

The previous prime is 9902111077. The next prime is 9902111113. The reversal of 9902111111 is 1111112099.

9902111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9902111111 - 2¹⁰ = 9902110087 is a prime.

It is a Duffinian number.

9902111111 is a modest number, since divided by 111111 gives 9902 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9902111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205805 + ... + 249318.

It is an arithmetic number, because the mean of its divisors is an integer number (2475646998).

Almost surely, 2^9902111111 is an apocalyptic number.

9902111111 is a deficient number, since it is larger than the sum of its proper divisors (476881).

9902111111 is a wasteful number, since it uses less digits than its factorization.

9902111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476880.

The product of its (nonzero) digits is 162, while the sum is 26.

The square root of 9902111111 is about 99509.3518770975. The cubic root of 9902111111 is about 2147.3817857510.

The spelling of 9902111111 in words is "nine billion, nine hundred two million, one hundred eleven thousand, one hundred eleven".