11101021120120 has 128 divisors (see below), whose sum is σ = 28005176908800. Its totient is φ = 3935540791296.

The previous prime is 11101021120081. The next prime is 11101021120121. The reversal of 11101021120120 is 2102112010111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11101021120120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101021120121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414852 + ... + 4730131.

It is an arithmetic number, because the mean of its divisors is an integer number (218790444600).

Almost surely, 2^{11101021120120} is an apocalyptic number.

11101021120120 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 11101021120120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14002588454400).

11101021120120 is an abundant number, since it is smaller than the sum of its proper divisors (16904155788680).

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

11101021120120 is a wasteful number, since it uses less digits than its factorization.

11101021120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145197 (or 5145193 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11101021120120 its reverse (2102112010111), we get a palindrome (13203133130231).

The spelling of 11101021120120 in words is "eleven trillion, one hundred one billion, twenty-one million, one hundred twenty thousand, one hundred twenty".