11212221110220 has 144 divisors (see below), whose sum is σ = 36682173047520. Its totient is φ = 2755742911488.

The previous prime is 11212221110197. The next prime is 11212221110269. The reversal of 11212221110220 is 2201112221211.

11212221110220 is a `hidden beast` number, since 1 + 1 + 212 + 221 + 1 + 10 + 220 = 666.

11212221110220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11212221110193 and 11212221110202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2093409 + ... + 5177528.

It is an arithmetic number, because the mean of its divisors is an integer number (254737312830).

Almost surely, 2^{11212221110220} is an apocalyptic number.

11212221110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212221110220 is an abundant number, since it is smaller than the sum of its proper divisors (25469951937300).

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

11212221110220 is a wasteful number, since it uses less digits than its factorization.

11212221110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7271624 (or 7271619 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11212221110220 its reverse (2201112221211), we get a palindrome (13413333331431).

The spelling of 11212221110220 in words is "eleven trillion, two hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, two hundred twenty".