12132043421 has 12 divisors (see below), whose sum is σ = 13069211040. Its totient is φ = 11257552320.

The previous prime is 12132043403. The next prime is 12132043433. The reversal of 12132043421 is 12434023121.

It is a de Polignac number, because none of the positive numbers 2^k-12132043421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12132043481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275111 + ... + 316148.

It is an arithmetic number, because the mean of its divisors is an integer number (1089100920).

Almost surely, 2^12132043421 is an apocalyptic number.

It is an amenable number.

12132043421 is a deficient number, since it is larger than the sum of its proper divisors (937167619).

12132043421 is an equidigital number, since it uses as much as digits as its factorization.

12132043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591364 (or 591347 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12132043421 its reverse (12434023121), we get a palindrome (24566066542).

The spelling of 12132043421 in words is "twelve billion, one hundred thirty-two million, forty-three thousand, four hundred twenty-one".