12001223121229 has 2 divisors, whose sum is σ = 12001223121230. Its totient is φ = 12001223121228.

The previous prime is 12001223121221. The next prime is 12001223121269. The reversal of 12001223121229 is 92212132210021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11346421718025 + 654801403204 = 3368445^2 + 809198^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001223121229 - 2³ = 12001223121221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001223121197 and 12001223121206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001223121221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000611560614 + 6000611560615.

It is an arithmetic number, because the mean of its divisors is an integer number (6000611560615).

Almost surely, 2^{12001223121229} is an apocalyptic number.

It is an amenable number.

12001223121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001223121229 is an equidigital number, since it uses as much as digits as its factorization.

12001223121229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 12001223121229 in words is "twelve trillion, one billion, two hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty-nine".