12132222022421 has 4 divisors (see below), whose sum is σ = 12132297272172. Its totient is φ = 12132146772672.

The previous prime is 12132222022373. The next prime is 12132222022441. The reversal of 12132222022421 is 12422022223121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8752455987025 + 3379766035396 = 2958455^2 + 1838414^2 .

It is a cyclic number.

It is not a de Polignac number, because 12132222022421 - 2¹⁰ = 12132222021397 is a prime.

It is a super-2 number, since 2×12132222022421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12132222022441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37382516 + ... + 37705661.

It is an arithmetic number, because the mean of its divisors is an integer number (3033074318043).

Almost surely, 2^{12132222022421} is an apocalyptic number.

It is an amenable number.

12132222022421 is a deficient number, since it is larger than the sum of its proper divisors (75249751).

12132222022421 is an equidigital number, since it uses as much as digits as its factorization.

12132222022421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75249750.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 12132222022421 its reverse (12422022223121), we get a palindrome (24554244245542).

The spelling of 12132222022421 in words is "twelve trillion, one hundred thirty-two billion, two hundred twenty-two million, twenty-two thousand, four hundred twenty-one".