191040101 has 16 divisors (see below), whose sum is σ = 236100096. Its totient is φ = 150832896.

The previous prime is 191040089. The next prime is 191040107. The reversal of 191040101 is 101040191.

It is a cyclic number.

It is not a de Polignac number, because 191040101 - 2¹⁰ = 191039077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 191040101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191040107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11486 + ... + 22671.

It is an arithmetic number, because the mean of its divisors is an integer number (14756256).

Almost surely, 2^191040101 is an apocalyptic number.

It is an amenable number.

191040101 is a deficient number, since it is larger than the sum of its proper divisors (45059995).

191040101 is a wasteful number, since it uses less digits than its factorization.

191040101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34228.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 191040101 is about 13821.7256882055. The cubic root of 191040101 is about 575.9368229400.

Adding to 191040101 its reverse (101040191), we get a palindrome (292080292).

The spelling of 191040101 in words is "one hundred ninety-one million, forty thousand, one hundred one".