191020041001 has 8 divisors (see below), whose sum is σ = 194741314560. Its totient is φ = 187303105392.

The previous prime is 191020040971. The next prime is 191020041061. The reversal of 191020041001 is 100140020191.

191020041001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 191020041001 - 2¹³ = 191020032809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191020041001.

It is not an unprimeable number, because it can be changed into a prime (191020041061) 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 7 ways as a sum of consecutive naturals, for example, 995491 + ... + 1171768.

It is an arithmetic number, because the mean of its divisors is an integer number (24342664320).

Almost surely, 2^191020041001 is an apocalyptic number.

It is an amenable number.

191020041001 is a deficient number, since it is larger than the sum of its proper divisors (3721273559).

191020041001 is a wasteful number, since it uses less digits than its factorization.

191020041001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168975.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 191020041001 its reverse (100140020191), we get a palindrome (291160061192).

The spelling of 191020041001 in words is "one hundred ninety-one billion, twenty million, forty-one thousand, one".