9990111011 has 4 divisors (see below), whose sum is σ = 10006569792. Its totient is φ = 9973652232.

The previous prime is 9990110987. The next prime is 9990111041. The reversal of 9990111011 is 1101110999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1101110999 = 107 ⋅10290757.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9990111011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9990111041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8228480 + ... + 8229693.

It is an arithmetic number, because the mean of its divisors is an integer number (2501642448).

Almost surely, 2^9990111011 is an apocalyptic number.

9990111011 is a deficient number, since it is larger than the sum of its proper divisors (16458781).

9990111011 is a wasteful number, since it uses less digits than its factorization.

9990111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16458780.

The product of its (nonzero) digits is 729, while the sum is 32.

The square root of 9990111011 is about 99950.5428249392. The cubic root of 9990111011 is about 2153.7242831085.

The spelling of 9990111011 in words is "nine billion, nine hundred ninety million, one hundred eleven thousand, eleven".