100001010191 has 8 divisors (see below), whose sum is σ = 100633885968. Its totient is φ = 99369936000.

The previous prime is 100001010143. The next prime is 100001010211. The reversal of 100001010191 is 191010100001.

It is a happy number.

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 100001010191 - 2⁶ = 100001010127 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 (100001010091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338945 + ... + 561146.

It is an arithmetic number, because the mean of its divisors is an integer number (12579235746).

Almost surely, 2^100001010191 is an apocalyptic number.

100001010191 is a deficient number, since it is larger than the sum of its proper divisors (632875777).

100001010191 is an equidigital number, since it uses as much as digits as its factorization.

100001010191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900793.

The product of its (nonzero) digits is 9, while the sum is 14.

Adding to 100001010191 its reverse (191010100001), we get a palindrome (291011110192).

The spelling of 100001010191 in words is "one hundred billion, one million, ten thousand, one hundred ninety-one".