11121120202221 has 16 divisors (see below), whose sum is σ = 16508488590720. Its totient is φ = 7399340403840.

The previous prime is 11121120202217. The next prime is 11121120202289. The reversal of 11121120202221 is 12220202112111.

11121120202221 is a `hidden beast` number, since 1 + 1 + 121 + 120 + 202 + 221 = 666.

It is not a de Polignac number, because 11121120202221 - 2² = 11121120202217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121120202194 and 11121120202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121120202201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409423140 + ... + 409450301.

It is an arithmetic number, because the mean of its divisors is an integer number (1031780536920).

Almost surely, 2^{11121120202221} is an apocalyptic number.

It is an amenable number.

11121120202221 is a deficient number, since it is larger than the sum of its proper divisors (5387368388499).

11121120202221 is an equidigital number, since it uses as much as digits as its factorization.

11121120202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818873953 (or 818873947 counting only the distinct ones).

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

Adding to 11121120202221 its reverse (12220202112111), we get a palindrome (23341322314332).

The spelling of 11121120202221 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty million, two hundred two thousand, two hundred twenty-one".