12200123230721 has 2 divisors, whose sum is σ = 12200123230722. Its totient is φ = 12200123230720.

The previous prime is 12200123230661. The next prime is 12200123230723. The reversal of 12200123230721 is 12703232100221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11462551438321 + 737571792400 = 3385639^2 + 858820^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200123230721 - 2⁶ = 12200123230657 is a prime.

Together with 12200123230723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12200123230723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100061615360 + 6100061615361.

It is an arithmetic number, because the mean of its divisors is an integer number (6100061615361).

Almost surely, 2^{12200123230721} is an apocalyptic number.

It is an amenable number.

12200123230721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200123230721 is an equidigital number, since it uses as much as digits as its factorization.

12200123230721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 12200123230721 its reverse (12703232100221), we get a palindrome (24903355330942).

The spelling of 12200123230721 in words is "twelve trillion, two hundred billion, one hundred twenty-three million, two hundred thirty thousand, seven hundred twenty-one".