11211120212220 has 288 divisors, whose sum is σ = 34664725315584. Its totient is φ = 2932476480000.

The previous prime is 11211120212219. The next prime is 11211120212309. The reversal of 11211120212220 is 2221202111211.

11211120212220 is a `hidden beast` number, since 1 + 1 + 211 + 1 + 20 + 212 + 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 = 11211120212193 and 11211120212202.

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, 1051398609 + ... + 1051409271.

It is an arithmetic number, because the mean of its divisors is an integer number (120363629568).

Almost surely, 2^{11211120212220} is an apocalyptic number.

11211120212220 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 11211120212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17332362657792).

11211120212220 is an abundant number, since it is smaller than the sum of its proper divisors (23453605103364).

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

11211120212220 is a wasteful number, since it uses less digits than its factorization.

11211120212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11313 (or 11308 counting only the distinct ones).

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

Adding to 11211120212220 its reverse (2221202111211), we get a palindrome (13432322323431).

The spelling of 11211120212220 in words is "eleven trillion, two hundred eleven billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty".