9990111101 has 6 divisors (see below), whose sum is σ = 10128842010. Its totient is φ = 9853255008.

The previous prime is 9990111077. The next prime is 9990111107. The reversal of 9990111101 is 1011110999.

It can be written as a sum of positive squares in 3 ways, for example, as 4723125625 + 5266985476 = 68725^2 + 72574^2 .

It is not a de Polignac number, because 9990111101 - 2²² = 9985916797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990111107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 932006 + ... + 942663.

It is an arithmetic number, because the mean of its divisors is an integer number (1688140335).

Almost surely, 2^9990111101 is an apocalyptic number.

It is an amenable number.

9990111101 is a deficient number, since it is larger than the sum of its proper divisors (138730909).

9990111101 is an equidigital number, since it uses as much as digits as its factorization.

9990111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874815 (or 1874742 counting only the distinct ones).

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

The square root of 9990111101 is about 99950.5432751618. The cubic root of 9990111101 is about 2153.7242895761.

The spelling of 9990111101 in words is "nine billion, nine hundred ninety million, one hundred eleven thousand, one hundred one".