12020111111 has 8 divisors (see below), whose sum is σ = 12051525024. Its totient is φ = 11988725760.

The previous prime is 12020111107. The next prime is 12020111149. The reversal of 12020111111 is 11111102021.

12020111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12020111111 - 2² = 12020111107 is a prime.

It is a super-2 number, since 2×12020111111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

12020111111 is a modest number, since divided by 111111 gives 12020 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12020111092 and 12020111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020111611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1023191 + ... + 1034871.

It is an arithmetic number, because the mean of its divisors is an integer number (1506440628).

Almost surely, 2^12020111111 is an apocalyptic number.

12020111111 is a deficient number, since it is larger than the sum of its proper divisors (31413913).

12020111111 is a wasteful number, since it uses less digits than its factorization.

12020111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14281.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12020111111 its reverse (11111102021), we get a palindrome (23131213132).

The spelling of 12020111111 in words is "twelve billion, twenty million, one hundred eleven thousand, one hundred eleven".