11012111220 has 48 divisors (see below), whose sum is σ = 33636996288. Its totient is φ = 2669602560.

The previous prime is 11012111213. The next prime is 11012111221. The reversal of 11012111220 is 2211121011.

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 = 11012111196 and 11012111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012111221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8341849 + ... + 8343168.

It is an arithmetic number, because the mean of its divisors is an integer number (700770756).

Almost surely, 2^11012111220 is an apocalyptic number.

11012111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11012111220 is an abundant number, since it is smaller than the sum of its proper divisors (22624885068).

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

11012111220 is a wasteful number, since it uses less digits than its factorization.

11012111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16685040 (or 16685038 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11012111220 its reverse (2211121011), we get a palindrome (13223232231).

The spelling of 11012111220 in words is "eleven billion, twelve million, one hundred eleven thousand, two hundred twenty".