12021122220011 has 4 divisors (see below), whose sum is σ = 12090608475792. Its totient is φ = 11951635964232.

The previous prime is 12021122220001. The next prime is 12021122220049. The reversal of 12021122220011 is 11002222112021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021122220011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021122220001) 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, 34743127631 + ... + 34743127976.

It is an arithmetic number, because the mean of its divisors is an integer number (3022652118948).

Almost surely, 2^{12021122220011} is an apocalyptic number.

12021122220011 is a deficient number, since it is larger than the sum of its proper divisors (69486255781).

12021122220011 is an equidigital number, since it uses as much as digits as its factorization.

12021122220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69486255780.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021122220011 its reverse (11002222112021), we get a palindrome (23023344332032).

The spelling of 12021122220011 in words is "twelve trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, eleven".