11220220212021 has 24 divisors (see below), whose sum is σ = 16223063906816. Its totient is φ = 7472727290880.

The previous prime is 11220220212011. The next prime is 11220220212023. The reversal of 11220220212021 is 12021202202211.

It is a happy number.

11220220212021 is a `hidden beast` number, since 1 + 1 + 220 + 220 + 21 + 202 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-11220220212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220220211985 and 11220220212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220220212023) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 88795116 + ... + 88921386.

Almost surely, 2^{11220220212021} is an apocalyptic number.

It is an amenable number.

11220220212021 is a deficient number, since it is larger than the sum of its proper divisors (5002843694795).

11220220212021 is a wasteful number, since it uses less digits than its factorization.

11220220212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135993 (or 135990 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11220220212021 its reverse (12021202202211), we get a palindrome (23241422414232).

The spelling of 11220220212021 in words is "eleven trillion, two hundred twenty billion, two hundred twenty million, two hundred twelve thousand, twenty-one".