12020111122211 has 4 divisors (see below), whose sum is σ = 12144029793672. Its totient is φ = 11896192450752.

The previous prime is 12020111122207. The next prime is 12020111122259. The reversal of 12020111122211 is 11222111102021.

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 12020111122211 - 2² = 12020111122207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12020111122211.

It is not an unprimeable number, because it can be changed into a prime (12020111122711) 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, 61959335585 + ... + 61959335778.

It is an arithmetic number, because the mean of its divisors is an integer number (3036007448418).

Almost surely, 2^{12020111122211} is an apocalyptic number.

12020111122211 is a deficient number, since it is larger than the sum of its proper divisors (123918671461).

12020111122211 is an equidigital number, since it uses as much as digits as its factorization.

12020111122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123918671460.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12020111122211 its reverse (11222111102021), we get a palindrome (23242222224232).

The spelling of 12020111122211 in words is "twelve trillion, twenty billion, one hundred eleven million, one hundred twenty-two thousand, two hundred eleven".