1191318310020 has 48 divisors (see below), whose sum is σ = 3366293958720. Its totient is φ = 314770340736.

The previous prime is 1191318309983. The next prime is 1191318310051. The reversal of 1191318310020 is 200138131911.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 1191318310020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91072842 + ... + 91085921.

It is an arithmetic number, because the mean of its divisors is an integer number (70131124140).

Almost surely, 2^{1191318310020} is an apocalyptic number.

1191318310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191318310020 is an abundant number, since it is smaller than the sum of its proper divisors (2174975648700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1191318310020 is a wasteful number, since it uses less digits than its factorization.

1191318310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182158884 (or 182158882 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 1191318310020 in words is "one trillion, one hundred ninety-one billion, three hundred eighteen million, three hundred ten thousand, twenty".