1191002819091 has 8 divisors (see below), whose sum is σ = 1589814484944. Its totient is φ = 793096516320.

The previous prime is 1191002819089. The next prime is 1191002819101. The reversal of 1191002819091 is 1909182001911.

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

It is not a de Polignac number, because 1191002819091 - 2¹ = 1191002819089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1191002819021) 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, 226337700 + ... + 226342961.

It is an arithmetic number, because the mean of its divisors is an integer number (198726810618).

Almost surely, 2^{1191002819091} is an apocalyptic number.

1191002819091 is a deficient number, since it is larger than the sum of its proper divisors (398811665853).

1191002819091 is an equidigital number, since it uses as much as digits as its factorization.

1191002819091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452681541.

The product of its (nonzero) digits is 11664, while the sum is 42.

The spelling of 1191002819091 in words is "one trillion, one hundred ninety-one billion, two million, eight hundred nineteen thousand, ninety-one".