11221220112021 has 6 divisors (see below), whose sum is σ = 16208429050710. Its totient is φ = 7480813408008.

The previous prime is 11221220112007. The next prime is 11221220112041. The reversal of 11221220112021 is 12021102212211.

11221220112021 is a `hidden beast` number, since 11 + 221 + 220 + 11 + 202 + 1 = 666.

11221220112021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9147533711121 + 2073686400900 = 3024489^2 + 1440030^2 .

It is not a de Polignac number, because 11221220112021 - 2⁵ = 11221220111989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221220111985 and 11221220112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221220112041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623401117326 + ... + 623401117343.

It is an arithmetic number, because the mean of its divisors is an integer number (2701404841785).

Almost surely, 2^{11221220112021} is an apocalyptic number.

It is an amenable number.

11221220112021 is a deficient number, since it is larger than the sum of its proper divisors (4987208938689).

11221220112021 is a wasteful number, since it uses less digits than its factorization.

11221220112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246802234675 (or 1246802234672 counting only the distinct ones).

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

Adding to 11221220112021 its reverse (12021102212211), we get a palindrome (23242322324232).

The spelling of 11221220112021 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, twenty-one".