1011132191 has 2 divisors, whose sum is σ = 1011132192. Its totient is φ = 1011132190.

The previous prime is 1011132179. The next prime is 1011132257. The reversal of 1011132191 is 1912311101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011132191 - 2¹⁰ = 1011131167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011132691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505566095 + 505566096.

It is an arithmetic number, because the mean of its divisors is an integer number (505566096).

Almost surely, 2^1011132191 is an apocalyptic number.

1011132191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011132191 is an equidigital number, since it uses as much as digits as its factorization.

1011132191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 20.

The square root of 1011132191 is about 31798.3048447555. The cubic root of 1011132191 is about 1003.6970453451.

Adding to 1011132191 its reverse (1912311101), we get a palindrome (2923443292).

The spelling of 1011132191 in words is "one billion, eleven million, one hundred thirty-two thousand, one hundred ninety-one".