199728901101 has 4 divisors (see below), whose sum is σ = 266305201472. Its totient is φ = 133152600732.

The previous prime is 199728901093. The next prime is 199728901109. The reversal of 199728901101 is 101109827991.

199728901101 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (199728901093) and next prime (199728901109).

It is not a de Polignac number, because 199728901101 - 2³ = 199728901093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199728901109) 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, 33288150181 + ... + 33288150186.

It is an arithmetic number, because the mean of its divisors is an integer number (66576300368).

Almost surely, 2^199728901101 is an apocalyptic number.

It is an amenable number.

199728901101 is a deficient number, since it is larger than the sum of its proper divisors (66576300371).

199728901101 is an equidigital number, since it uses as much as digits as its factorization.

199728901101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66576300370.

The product of its (nonzero) digits is 81648, while the sum is 48.

The spelling of 199728901101 in words is "one hundred ninety-nine billion, seven hundred twenty-eight million, nine hundred one thousand, one hundred one".