11021221112 has 96 divisors (see below), whose sum is σ = 23166259200. Its totient is φ = 4910917440.

The previous prime is 11021221093. The next prime is 11021221139. The reversal of 11021221112 is 21112212011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12770393 + ... + 12771255.

It is an arithmetic number, because the mean of its divisors is an integer number (241315200).

Almost surely, 2^11021221112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11021221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11583129600).

11021221112 is an abundant number, since it is smaller than the sum of its proper divisors (12145038088).

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

11021221112 is a wasteful number, since it uses less digits than its factorization.

11021221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11021221112 its reverse (21112212011), we get a palindrome (32133433123).

The spelling of 11021221112 in words is "eleven billion, twenty-one million, two hundred twenty-one thousand, one hundred twelve".