11217118449920 has 72 divisors (see below), whose sum is σ = 26875386014400. Its totient is φ = 4485698140160.

The previous prime is 11217118449917. The next prime is 11217118449947. The reversal of 11217118449920 is 2994481171211.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3885731 + ... + 6126429.

It is an arithmetic number, because the mean of its divisors is an integer number (373269250200).

Almost surely, 2^{11217118449920} is an apocalyptic number.

11217118449920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11217118449920 is an abundant number, since it is smaller than the sum of its proper divisors (15658267564480).

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

11217118449920 is an equidigital number, since it uses as much as digits as its factorization.

11217118449920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244631 (or 2244617 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 50.

The spelling of 11217118449920 in words is "eleven trillion, two hundred seventeen billion, one hundred eighteen million, four hundred forty-nine thousand, nine hundred twenty".