12230121132221 has 2 divisors, whose sum is σ = 12230121132222. Its totient is φ = 12230121132220.

The previous prime is 12230121132199. The next prime is 12230121132247. The reversal of 12230121132221 is 12223112103221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12133204725625 + 96916406596 = 3483275^2 + 311314^2 .

It is a cyclic number.

It is not a de Polignac number, because 12230121132221 - 2¹⁰ = 12230121131197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12230121132521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115060566110 + 6115060566111.

It is an arithmetic number, because the mean of its divisors is an integer number (6115060566111).

Almost surely, 2^{12230121132221} is an apocalyptic number.

It is an amenable number.

12230121132221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12230121132221 is an equidigital number, since it uses as much as digits as its factorization.

12230121132221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12230121132221 its reverse (12223112103221), we get a palindrome (24453233235442).

The spelling of 12230121132221 in words is "twelve trillion, two hundred thirty billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred twenty-one".