1115721472218 has 32 divisors (see below), whose sum is σ = 2271144220800. Its totient is φ = 365307053760.

The previous prime is 1115721472199. The next prime is 1115721472237. The reversal of 1115721472218 is 8122741275111.

It is an interprime number because it is at equal distance from previous prime (1115721472199) and next prime (1115721472237).

It is a self number, because there is not a number n which added to its sum of digits gives 1115721472218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1830493 + ... + 2362656.

It is an arithmetic number, because the mean of its divisors is an integer number (70973256900).

Almost surely, 2^{1115721472218} is an apocalyptic number.

1115721472218 is an abundant number, since it is smaller than the sum of its proper divisors (1155422748582).

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

1115721472218 is a wasteful number, since it uses less digits than its factorization.

1115721472218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193942.

The product of its digits is 62720, while the sum is 42.

The spelling of 1115721472218 in words is "one trillion, one hundred fifteen billion, seven hundred twenty-one million, four hundred seventy-two thousand, two hundred eighteen".