11100212220 has 48 divisors (see below), whose sum is σ = 32908867488. Its totient is φ = 2785935360.

The previous prime is 11100212209. The next prime is 11100212257. The reversal of 11100212220 is 2221200111.

It is a super-3 number, since 3×11100212220³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11100212196 and 11100212205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5440261 + ... + 5442300.

It is an arithmetic number, because the mean of its divisors is an integer number (685601406).

Almost surely, 2^11100212220 is an apocalyptic number.

11100212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11100212220 is an abundant number, since it is smaller than the sum of its proper divisors (21808655268).

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

11100212220 is a wasteful number, since it uses less digits than its factorization.

11100212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10882590 (or 10882588 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11100212220 its reverse (2221200111), we get a palindrome (13321412331).

The spelling of 11100212220 in words is "eleven billion, one hundred million, two hundred twelve thousand, two hundred twenty".