11212221120020 has 24 divisors (see below), whose sum is σ = 23554217197224. Its totient is φ = 4483259334656.

The previous prime is 11212221120013. The next prime is 11212221120043. The reversal of 11212221120020 is 2002112221211.

It can be written as a sum of positive squares in 4 ways, for example, as 1235694577924 + 9976526542096 = 1111618^2 + 3158564^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101763149 + ... + 101873268.

It is an arithmetic number, because the mean of its divisors is an integer number (981425716551).

Almost surely, 2^{11212221120020} is an apocalyptic number.

11212221120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212221120020 is an abundant number, since it is smaller than the sum of its proper divisors (12341996077204).

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

11212221120020 is a wasteful number, since it uses less digits than its factorization.

11212221120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203639179 (or 203639177 counting only the distinct ones).

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

Adding to 11212221120020 its reverse (2002112221211), we get a palindrome (13214333341231).

The spelling of 11212221120020 in words is "eleven trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty thousand, twenty".