12221020012111 has 4 divisors (see below), whose sum is σ = 12225848548824. Its totient is φ = 12216191475400.

The previous prime is 12221020012099. The next prime is 12221020012147. The reversal of 12221020012111 is 11121002012221.

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 12221020012111 - 2¹⁷ = 12221019881039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221020012171) 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, 2414264560 + ... + 2414269621.

It is an arithmetic number, because the mean of its divisors is an integer number (3056462137206).

Almost surely, 2^{12221020012111} is an apocalyptic number.

12221020012111 is a deficient number, since it is larger than the sum of its proper divisors (4828536713).

12221020012111 is an equidigital number, since it uses as much as digits as its factorization.

12221020012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828536712.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12221020012111 its reverse (11121002012221), we get a palindrome (23342022024332).

The spelling of 12221020012111 in words is "twelve trillion, two hundred twenty-one billion, twenty million, twelve thousand, one hundred eleven".