11021012220 has 24 divisors (see below), whose sum is σ = 30858834384. Its totient is φ = 2938936576.

The previous prime is 11021012159. The next prime is 11021012227. The reversal of 11021012220 is 2221012011.

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 = 11021012196 and 11021012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021012227) 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, 91841709 + ... + 91841828.

It is an arithmetic number, because the mean of its divisors is an integer number (1285784766).

Almost surely, 2^11021012220 is an apocalyptic number.

11021012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021012220 is an abundant number, since it is smaller than the sum of its proper divisors (19837822164).

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

11021012220 is a wasteful number, since it uses less digits than its factorization.

11021012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183683549 (or 183683547 counting only the distinct ones).

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

Adding to 11021012220 its reverse (2221012011), we get a palindrome (13242024231).

The spelling of 11021012220 in words is "eleven billion, twenty-one million, twelve thousand, two hundred twenty".