11001220403240 has 64 divisors (see below), whose sum is σ = 25034655260160. Its totient is φ = 4350513139200.

The previous prime is 11001220403233. The next prime is 11001220403263. The reversal of 11001220403240 is 4230402210011.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254657 + ... + 4697583.

It is an arithmetic number, because the mean of its divisors is an integer number (391166488440).

Almost surely, 2^{11001220403240} is an apocalyptic number.

11001220403240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001220403240 is an abundant number, since it is smaller than the sum of its proper divisors (14033434856920).

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

11001220403240 is a wasteful number, since it uses less digits than its factorization.

11001220403240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443642 (or 4443638 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 11001220403240 its reverse (4230402210011), we get a palindrome (15231622613251).

The spelling of 11001220403240 in words is "eleven trillion, one billion, two hundred twenty million, four hundred three thousand, two hundred forty".