11100121212220 has 48 divisors (see below), whose sum is σ = 23560786908288. Its totient is φ = 4392401753600.

The previous prime is 11100121212199. The next prime is 11100121212223. The reversal of 11100121212220 is 2221212100111.

It is a junction number, because it is equal to n+sod(n) for n = 11100121212194 and 11100121212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100121212223) 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, 106797 + ... + 4712923.

It is an arithmetic number, because the mean of its divisors is an integer number (490849727256).

Almost surely, 2^{11100121212220} is an apocalyptic number.

11100121212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11100121212220 is an abundant number, since it is smaller than the sum of its proper divisors (12460665696068).

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

11100121212220 is a wasteful number, since it uses less digits than its factorization.

11100121212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607430 (or 4607428 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11100121212220 its reverse (2221212100111), we get a palindrome (13321333312331).

It can be divided in two parts, 1110012 and 1212220, that added together give a palindrome (2322232).

The spelling of 11100121212220 in words is "eleven trillion, one hundred billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty".