12221202011121 has 8 divisors (see below), whose sum is σ = 18105484460960. Its totient is φ = 8147468007396.

The previous prime is 12221202011093. The next prime is 12221202011129. The reversal of 12221202011121 is 12111020212221.

12221202011121 is a `hidden beast` number, since 1 + 222 + 120 + 201 + 1 + 121 = 666.

It is not a de Polignac number, because 12221202011121 - 2⁵ = 12221202011089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221202011094 and 12221202011103.

It is not an unprimeable number, because it can be changed into a prime (12221202011129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226318555735 + ... + 226318555788.

It is an arithmetic number, because the mean of its divisors is an integer number (2263185557620).

Almost surely, 2^{12221202011121} is an apocalyptic number.

It is an amenable number.

12221202011121 is a deficient number, since it is larger than the sum of its proper divisors (5884282449839).

12221202011121 is an equidigital number, since it uses as much as digits as its factorization.

12221202011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452637111532 (or 452637111526 counting only the distinct ones).

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

Adding to 12221202011121 its reverse (12111020212221), we get a palindrome (24332222223342).

The spelling of 12221202011121 in words is "twelve trillion, two hundred twenty-one billion, two hundred two million, eleven thousand, one hundred twenty-one".