12020122111 has 4 divisors (see below), whose sum is σ = 12184781392. Its totient is φ = 11855462832.

The previous prime is 12020122091. The next prime is 12020122141. The reversal of 12020122111 is 11122102021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11122102021 = 41 ⋅271270781.

It is a cyclic number.

It is not a de Polignac number, because 12020122111 - 2⁹ = 12020121599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020122091 and 12020122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020122141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82329531 + ... + 82329676.

It is an arithmetic number, because the mean of its divisors is an integer number (3046195348).

Almost surely, 2^12020122111 is an apocalyptic number.

12020122111 is a deficient number, since it is larger than the sum of its proper divisors (164659281).

12020122111 is an equidigital number, since it uses as much as digits as its factorization.

12020122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164659280.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12020122111 its reverse (11122102021), we get a palindrome (23142224132).

The spelling of 12020122111 in words is "twelve billion, twenty million, one hundred twenty-two thousand, one hundred eleven".