11220212011221 has 20 divisors (see below), whose sum is σ = 16766831502432. Its totient is φ = 7477564490568.

The previous prime is 11220212011163. The next prime is 11220212011243. The reversal of 11220212011221 is 12211021202211.

11220212011221 is a `hidden beast` number, since 1 + 1 + 220 + 21 + 201 + 1 + 221 = 666.

It is not a de Polignac number, because 11220212011221 - 2⁷ = 11220212011093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220212011194 and 11220212011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220212012221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23623131 + ... + 24093416.

Almost surely, 2^{11220212011221} is an apocalyptic number.

It is an amenable number.

11220212011221 is a deficient number, since it is larger than the sum of its proper divisors (5546619491211).

11220212011221 is an equidigital number, since it uses as much as digits as its factorization.

11220212011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47719462 (or 47719453 counting only the distinct ones).

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

Adding to 11220212011221 its reverse (12211021202211), we get a palindrome (23431233213432).

The spelling of 11220212011221 in words is "eleven trillion, two hundred twenty billion, two hundred twelve million, eleven thousand, two hundred twenty-one".