12013111143 has 24 divisors (see below), whose sum is σ = 19056819600. Its totient is φ = 7231800960.

The previous prime is 12013111109. The next prime is 12013111181. The reversal of 12013111143 is 34111131021.

It is a happy number.

It is not a de Polignac number, because 12013111143 - 2¹² = 12013107047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013111193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392446 + ... + 421947.

It is an arithmetic number, because the mean of its divisors is an integer number (794034150).

Almost surely, 2^12013111143 is an apocalyptic number.

12013111143 is a deficient number, since it is larger than the sum of its proper divisors (7043708457).

12013111143 is a wasteful number, since it uses less digits than its factorization.

12013111143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814559 (or 814556 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 12013111143 its reverse (34111131021), we get a palindrome (46124242164).

The spelling of 12013111143 in words is "twelve billion, thirteen million, one hundred eleven thousand, one hundred forty-three".