12221221120111 has 4 divisors (see below), whose sum is σ = 12222256214592. Its totient is φ = 12220186025632.

The previous prime is 12221221120081. The next prime is 12221221120127. The reversal of 12221221120111 is 11102112212221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12221221120111 - 2²¹ = 12221219022959 is a prime.

It is a super-3 number, since 3×12221221120111³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221221120211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517529530 + ... + 517553143.

It is an arithmetic number, because the mean of its divisors is an integer number (3055564053648).

Almost surely, 2^{12221221120111} is an apocalyptic number.

12221221120111 is a deficient number, since it is larger than the sum of its proper divisors (1035094481).

12221221120111 is a wasteful number, since it uses less digits than its factorization.

12221221120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035094480.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12221221120111 its reverse (11102112212221), we get a palindrome (23323333332332).

The spelling of 12221221120111 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred eleven".