11011212220 has 24 divisors (see below), whose sum is σ = 23129490384. Its totient is φ = 4403352576.

The previous prime is 11011212193. The next prime is 11011212221. The reversal of 11011212220 is 2221211011.

It is a self number, because there is not a number n which added to its sum of digits gives 11011212220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11292 + ... + 148828.

It is an arithmetic number, because the mean of its divisors is an integer number (963728766).

Almost surely, 2^11011212220 is an apocalyptic number.

11011212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011212220 is an abundant number, since it is smaller than the sum of its proper divisors (12118278164).

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

11011212220 is a wasteful number, since it uses less digits than its factorization.

11011212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141549 (or 141547 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11011212220 its reverse (2221211011), we get a palindrome (13232423231).

The spelling of 11011212220 in words is "eleven billion, eleven million, two hundred twelve thousand, two hundred twenty".