11011222221020 has 96 divisors (see below), whose sum is σ = 26562584832000. Its totient is φ = 3755901498624.

The previous prime is 11011222221007. The next prime is 11011222221113. The reversal of 11011222221020 is 2012222211011.

It is a self number, because there is not a number n which added to its sum of digits gives 11011222221020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384147209 + ... + 384175871.

It is an arithmetic number, because the mean of its divisors is an integer number (276693592000).

Almost surely, 2^{11011222221020} is an apocalyptic number.

11011222221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11011222221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13281292416000).

11011222221020 is an abundant number, since it is smaller than the sum of its proper divisors (15551362610980).

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

11011222221020 is a wasteful number, since it uses less digits than its factorization.

11011222221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42667 (or 42665 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11011222221020 its reverse (2012222211011), we get a palindrome (13023444432031).

The spelling of 11011222221020 in words is "eleven trillion, eleven billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty".