191011110100001 has 16 divisors (see below), whose sum is σ = 194205518207808. Its totient is φ = 187843686984000.

The previous prime is 191011110099991. The next prime is 191011110100037. The reversal of 191011110100001 is 100001011110191.

It is a cyclic number.

It is not a de Polignac number, because 191011110100001 - 2⁶ = 191011110099937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191011110100301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23107730 + ... + 30265316.

It is an arithmetic number, because the mean of its divisors is an integer number (12137844887988).

Almost surely, 2^{191011110100001} is an apocalyptic number.

It is an amenable number.

191011110100001 is a deficient number, since it is larger than the sum of its proper divisors (3194408107807).

191011110100001 is a wasteful number, since it uses less digits than its factorization.

191011110100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7159472.

The product of its (nonzero) digits is 9, while the sum is 17.

Adding to 191011110100001 its reverse (100001011110191), we get a palindrome (291012121210192).

The spelling of 191011110100001 in words is "one hundred ninety-one trillion, eleven billion, one hundred ten million, one hundred thousand, one".