11100120000 has 280 divisors, whose sum is σ = 36949934736. Its totient is φ = 2939904000.

The previous prime is 11100119969. The next prime is 11100120001. The reversal of 11100120000 is 2100111.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100120001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27959802 + ... + 27960198.

Almost surely, 2^11100120000 is an apocalyptic number.

11100120000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11100120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18474967368).

11100120000 is an abundant number, since it is smaller than the sum of its proper divisors (25849814736).

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

11100120000 is an equidigital number, since it uses as much as digits as its factorization.

11100120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 11100120000 its reverse (2100111), we get a palindrome (11102220111).

The spelling of 11100120000 in words is "eleven billion, one hundred million, one hundred twenty thousand".