1191227133 has 8 divisors (see below), whose sum is σ = 1588633600. Its totient is φ = 793986048.

The previous prime is 1191227131. The next prime is 1191227153. The reversal of 1191227133 is 3317221911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1191227133 - 2¹ = 1191227131 is a prime.

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 1191227133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191227131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23428 + ... + 54141.

It is an arithmetic number, because the mean of its divisors is an integer number (198579200).

Almost surely, 2^1191227133 is an apocalyptic number.

It is an amenable number.

1191227133 is a deficient number, since it is larger than the sum of its proper divisors (397406467).

1191227133 is an equidigital number, since it uses as much as digits as its factorization.

1191227133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82691.

The product of its digits is 2268, while the sum is 30.

The square root of 1191227133 is about 34514.1584425870. The cubic root of 1191227133 is about 1060.0626321720.

The spelling of 1191227133 in words is "one billion, one hundred ninety-one million, two hundred twenty-seven thousand, one hundred thirty-three".