11211100220 has 48 divisors (see below), whose sum is σ = 24913018368. Its totient is φ = 4229037120.

The previous prime is 11211100181. The next prime is 11211100249. The reversal of 11211100220 is 2200111211.

11211100220 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138974 + ... + 204293.

It is an arithmetic number, because the mean of its divisors is an integer number (519021216).

Almost surely, 2^11211100220 is an apocalyptic number.

11211100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211100220 is an abundant number, since it is smaller than the sum of its proper divisors (13701918148).

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

11211100220 is a wasteful number, since it uses less digits than its factorization.

11211100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343370 (or 343368 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11211100220 its reverse (2200111211), we get a palindrome (13411211431).

The spelling of 11211100220 in words is "eleven billion, two hundred eleven million, one hundred thousand, two hundred twenty".