121230203231321 has 2 divisors, whose sum is σ = 121230203231322. Its totient is φ = 121230203231320.

The previous prime is 121230203231261. The next prime is 121230203231323. The reversal of 121230203231321 is 123132302032121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113942708616025 + 7287494615296 = 10674395^2 + 2699536^2 .

It is a cyclic number.

It is not a de Polignac number, because 121230203231321 - 2²⁶ = 121230136122457 is a prime.

Together with 121230203231323, 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 (121230203231323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615101615660 + 60615101615661.

It is an arithmetic number, because the mean of its divisors is an integer number (60615101615661).

Almost surely, 2^{121230203231321} is an apocalyptic number.

It is an amenable number.

121230203231321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121230203231321 is an equidigital number, since it uses as much as digits as its factorization.

121230203231321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 121230203231321 its reverse (123132302032121), we get a palindrome (244362505263442).

The spelling of 121230203231321 in words is "one hundred twenty-one trillion, two hundred thirty billion, two hundred three million, two hundred thirty-one thousand, three hundred twenty-one".