11222121021020 has 288 divisors, whose sum is σ = 30553134655680. Its totient is φ = 3427766415360.

The previous prime is 11222121020983. The next prime is 11222121021043. The reversal of 11222121021020 is 2012012122211.

It is a self number, because there is not a number n which added to its sum of digits gives 11222121021020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1280913440 + ... + 1280922200.

It is an arithmetic number, because the mean of its divisors is an integer number (106087273110).

Almost surely, 2^{11222121021020} is an apocalyptic number.

11222121021020 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 11222121021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15276567327840).

11222121021020 is an abundant number, since it is smaller than the sum of its proper divisors (19331013634660).

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

11222121021020 is a wasteful number, since it uses less digits than its factorization.

11222121021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12293 (or 12284 counting only the distinct ones).

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

Adding to 11222121021020 its reverse (2012012122211), we get a palindrome (13234133143231).

The spelling of 11222121021020 in words is "eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, twenty".