12132423421 has 2 divisors, whose sum is σ = 12132423422. Its totient is φ = 12132423420.

The previous prime is 12132423379. The next prime is 12132423431. The reversal of 12132423421 is 12432423121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11451996196 + 680427225 = 107014^2 + 26085^2 .

It is a cyclic number.

It is not a de Polignac number, because 12132423421 - 2²⁷ = 11998205693 is a prime.

It is a super-3 number, since 3×12132423421³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12132423431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6066211710 + 6066211711.

It is an arithmetic number, because the mean of its divisors is an integer number (6066211711).

Almost surely, 2^12132423421 is an apocalyptic number.

It is an amenable number.

12132423421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12132423421 is an equidigital number, since it uses as much as digits as its factorization.

12132423421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

Adding to 12132423421 its reverse (12432423121), we get a palindrome (24564846542).

The spelling of 12132423421 in words is "twelve billion, one hundred thirty-two million, four hundred twenty-three thousand, four hundred twenty-one".