1010001191 has 2 divisors, whose sum is σ = 1010001192. Its totient is φ = 1010001190.

The previous prime is 1010001163. The next prime is 1010001197. The reversal of 1010001191 is 1911000101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010001191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010001197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505000595 + 505000596.

It is an arithmetic number, because the mean of its divisors is an integer number (505000596).

Almost surely, 2^1010001191 is an apocalyptic number.

1010001191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010001191 is an equidigital number, since it uses as much as digits as its factorization.

1010001191 is an evil number, because the sum of its binary digits is even.

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

The square root of 1010001191 is about 31780.5159020429. The cubic root of 1010001191 is about 1003.3226779171.

Adding to 1010001191 its reverse (1911000101), we get a palindrome (2921001292).

The spelling of 1010001191 in words is "one billion, ten million, one thousand, one hundred ninety-one".