12123421143 has 16 divisors (see below), whose sum is σ = 17149317120. Its totient is φ = 7596602496.

The previous prime is 12123421129. The next prime is 12123421153. The reversal of 12123421143 is 34112432121.

It is not a de Polignac number, because 12123421143 - 2¹⁰ = 12123420119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123421153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830130 + ... + 844607.

It is an arithmetic number, because the mean of its divisors is an integer number (1071832320).

Almost surely, 2^12123421143 is an apocalyptic number.

12123421143 is a deficient number, since it is larger than the sum of its proper divisors (5025895977).

12123421143 is a wasteful number, since it uses less digits than its factorization.

12123421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674886.

The product of its digits is 1152, while the sum is 24.

Adding to 12123421143 its reverse (34112432121), we get a palindrome (46235853264).

The spelling of 12123421143 in words is "twelve billion, one hundred twenty-three million, four hundred twenty-one thousand, one hundred forty-three".