11111121110220 has 48 divisors (see below), whose sum is σ = 32114724246528. Its totient is φ = 2867386092480.

The previous prime is 11111121110183. The next prime is 11111121110227. The reversal of 11111121110220 is 2201112111111.

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 11111121110220.

It is not an unprimeable number, because it can be changed into a prime (11111121110227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2986858654 + ... + 2986862373.

It is an arithmetic number, because the mean of its divisors is an integer number (669056755136).

Almost surely, 2^{11111121110220} is an apocalyptic number.

11111121110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111121110220 is an abundant number, since it is smaller than the sum of its proper divisors (21003603136308).

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

11111121110220 is a wasteful number, since it uses less digits than its factorization.

11111121110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5973721070 (or 5973721068 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11111121110220 its reverse (2201112111111), we get a palindrome (13312233221331).

The spelling of 11111121110220 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty".