11101112021220 has 96 divisors (see below), whose sum is σ = 33672194532480. Its totient is φ = 2732581388160.

The previous prime is 11101112021201. The next prime is 11101112021239. The reversal of 11101112021220 is 2212021110111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11101112021201) and next prime (11101112021239).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11101112021220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41975266 + ... + 42238905.

It is an arithmetic number, because the mean of its divisors is an integer number (350752026380).

Almost surely, 2^{11101112021220} is an apocalyptic number.

11101112021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101112021220 is an abundant number, since it is smaller than the sum of its proper divisors (22571082511260).

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

11101112021220 is a wasteful number, since it uses less digits than its factorization.

11101112021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84214222 (or 84214194 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11101112021220 its reverse (2212021110111), we get a palindrome (13313133131331).

The spelling of 11101112021220 in words is "eleven trillion, one hundred one billion, one hundred twelve million, twenty-one thousand, two hundred twenty".