12506021143 has 32 divisors (see below), whose sum is σ = 16109862912. Its totient is φ = 9425656800.

The previous prime is 12506021131. The next prime is 12506021191. The reversal of 12506021143 is 34112060521.

It is a happy number.

It is not a de Polignac number, because 12506021143 - 2⁵ = 12506021111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12506021243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322698 + ... + 359368.

It is an arithmetic number, because the mean of its divisors is an integer number (503433216).

Almost surely, 2^12506021143 is an apocalyptic number.

12506021143 is a deficient number, since it is larger than the sum of its proper divisors (3603841769).

12506021143 is a wasteful number, since it uses less digits than its factorization.

12506021143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36835.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 12506021143 its reverse (34112060521), we get a palindrome (46618081664).

The spelling of 12506021143 in words is "twelve billion, five hundred six million, twenty-one thousand, one hundred forty-three".