12221022220121 has 16 divisors (see below), whose sum is σ = 14539305903360. Its totient is φ = 10125588021120.

The previous prime is 12221022220103. The next prime is 12221022220129. The reversal of 12221022220121 is 12102222012221.

It is not a de Polignac number, because 12221022220121 - 2¹⁰ = 12221022219097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221022220093 and 12221022220102.

It is not an unprimeable number, because it can be changed into a prime (12221022220129) 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, 540885500 + ... + 540908093.

It is an arithmetic number, because the mean of its divisors is an integer number (908706618960).

Almost surely, 2^{12221022220121} is an apocalyptic number.

12221022220121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221022220121 is a deficient number, since it is larger than the sum of its proper divisors (2318283683239).

12221022220121 is a wasteful number, since it uses less digits than its factorization.

12221022220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081793696.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12221022220121 its reverse (12102222012221), we get a palindrome (24323244232342).

The spelling of 12221022220121 in words is "twelve trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty thousand, one hundred twenty-one".