11112121212220 has 96 divisors (see below), whose sum is σ = 27634737715200. Its totient is φ = 3674163677184.

The previous prime is 11112121212211. The next prime is 11112121212251. The reversal of 11112121212220 is 2221212121111.

It is a happy number.

11112121212220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 11207125 + ... + 12158284.

It is an arithmetic number, because the mean of its divisors is an integer number (287861851200).

Almost surely, 2^{11112121212220} is an apocalyptic number.

11112121212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112121212220 is an abundant number, since it is smaller than the sum of its proper divisors (16522616502980).

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

11112121212220 is a wasteful number, since it uses less digits than its factorization.

11112121212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23365547 (or 23365545 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11112121212220 its reverse (2221212121111), we get a palindrome (13333333333331).

The spelling of 11112121212220 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty".