1191010001 has 8 divisors (see below), whose sum is σ = 1220197440. Its totient is φ = 1161890352.

The previous prime is 1191009997. The next prime is 1191010013. The reversal of 1191010001 is 1000101911.

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 1191010001 - 2² = 1191009997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1191010061) 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, 19571 + ... + 52583.

It is an arithmetic number, because the mean of its divisors is an integer number (152524680).

Almost surely, 2^1191010001 is an apocalyptic number.

It is an amenable number.

1191010001 is a deficient number, since it is larger than the sum of its proper divisors (29187439).

1191010001 is an equidigital number, since it uses as much as digits as its factorization.

1191010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33895.

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

The square root of 1191010001 is about 34511.0127495558. The cubic root of 1191010001 is about 1059.9982203008.

Adding to 1191010001 its reverse (1000101911), we get a palindrome (2191111912).

The spelling of 1191010001 in words is "one billion, one hundred ninety-one million, ten thousand, one".