11121120221121 has 8 divisors (see below), whose sum is σ = 16475733660960. Its totient is φ = 7414080147396.

The previous prime is 11121120221117. The next prime is 11121120221137. The reversal of 11121120221121 is 12112202112111.

It is a happy number.

11121120221121 is a `hidden beast` number, since 111 + 211 + 2 + 0 + 221 + 121 = 666.

It is not a de Polignac number, because 11121120221121 - 2² = 11121120221117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121120221094 and 11121120221103.

It is not an unprimeable number, because it can be changed into a prime (11121120221161) 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 7 ways as a sum of consecutive naturals, for example, 205946670735 + ... + 205946670788.

It is an arithmetic number, because the mean of its divisors is an integer number (2059466707620).

Almost surely, 2^{11121120221121} is an apocalyptic number.

It is an amenable number.

11121120221121 is a deficient number, since it is larger than the sum of its proper divisors (5354613439839).

11121120221121 is an equidigital number, since it uses as much as digits as its factorization.

11121120221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411893341532 (or 411893341526 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11121120221121 its reverse (12112202112111), we get a palindrome (23233322333232).

The spelling of 11121120221121 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".