11220211112220 has 144 divisors (see below), whose sum is σ = 37155749615712. Its totient is φ = 2718069419520.

The previous prime is 11220211112219. The next prime is 11220211112281. The reversal of 11220211112220 is 2221111202211.

11220211112220 is a `hidden beast` number, since 1 + 1 + 220 + 211 + 1 + 12 + 220 = 666.

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 = 11220211112193 and 11220211112202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 654894 + ... + 4782186.

It is an arithmetic number, because the mean of its divisors is an integer number (258026038998).

Almost surely, 2^{11220211112220} is an apocalyptic number.

11220211112220 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 11220211112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18577874807856).

11220211112220 is an abundant number, since it is smaller than the sum of its proper divisors (25935538503492).

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

11220211112220 is a wasteful number, since it uses less digits than its factorization.

11220211112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128692 (or 4128687 counting only the distinct ones).

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

Adding to 11220211112220 its reverse (2221111202211), we get a palindrome (13441322314431).

The spelling of 11220211112220 in words is "eleven trillion, two hundred twenty billion, two hundred eleven million, one hundred twelve thousand, two hundred twenty".