12002111111 has 4 divisors (see below), whose sum is σ = 12002341800. Its totient is φ = 12001880424.

The previous prime is 12002111087. The next prime is 12002111123. The reversal of 12002111111 is 11111120021.

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-12002111111 is a prime.

It is a super-2 number, since 2×12002111111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

12002111111 is a modest number, since divided by 111111 gives 12002 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12002111092 and 12002111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002111161) 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, 3545 + ... + 154973.

It is an arithmetic number, because the mean of its divisors is an integer number (3000585450).

Almost surely, 2^12002111111 is an apocalyptic number.

12002111111 is a deficient number, since it is larger than the sum of its proper divisors (230689).

12002111111 is an equidigital number, since it uses as much as digits as its factorization.

12002111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230688.

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

Adding to 12002111111 its reverse (11111120021), we get a palindrome (23113231132).

It can be divided in two parts, 120021 and 11111, that multiplied together give a palindrome (1333553331).

The spelling of 12002111111 in words is "twelve billion, two million, one hundred eleven thousand, one hundred eleven".