101999011 has 4 divisors (see below), whose sum is σ = 107367400. Its totient is φ = 96630624.

The previous prime is 101998999. The next prime is 101999017. The reversal of 101999011 is 110999101.

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 101999011 - 2⁵ = 101998979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101999017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2684166 + ... + 2684203.

It is an arithmetic number, because the mean of its divisors is an integer number (26841850).

Almost surely, 2^101999011 is an apocalyptic number.

101999011 is a deficient number, since it is larger than the sum of its proper divisors (5368389).

101999011 is an equidigital number, since it uses as much as digits as its factorization.

101999011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5368388.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 101999011 is about 10099.4559754474. The cubic root of 101999011 is about 467.2313627218.

The spelling of 101999011 in words is "one hundred one million, nine hundred ninety-nine thousand, eleven".