11220220121121 has 48 divisors (see below), whose sum is σ = 17921493807360. Its totient is φ = 6707551368960.

The previous prime is 11220220121093. The next prime is 11220220121129. The reversal of 11220220121121 is 12112102202211.

11220220121121 is a `hidden beast` number, since 11 + 220 + 2 + 201 + 211 + 21 = 666.

It is not a de Polignac number, because 11220220121121 - 2⁹ = 11220220120609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220220121094 and 11220220121103.

It is not an unprimeable number, because it can be changed into a prime (11220220121129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7384695 + ... + 8773491.

It is an arithmetic number, because the mean of its divisors is an integer number (373364454320).

Almost surely, 2^{11220220121121} is an apocalyptic number.

11220220121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11220220121121 is a deficient number, since it is larger than the sum of its proper divisors (6701273686239).

11220220121121 is a wasteful number, since it uses less digits than its factorization.

11220220121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389926 (or 1389923 counting only the distinct ones).

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

Adding to 11220220121121 its reverse (12112102202211), we get a palindrome (23332322323332).

The spelling of 11220220121121 in words is "eleven trillion, two hundred twenty billion, two hundred twenty million, one hundred twenty-one thousand, one hundred twenty-one".