13230405821 has 2 divisors, whose sum is σ = 13230405822. Its totient is φ = 13230405820.

The previous prime is 13230405809. The next prime is 13230405823. The reversal of 13230405821 is 12850403231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8672265625 + 4558140196 = 93125^2 + 67514^2 .

It is a cyclic number.

It is not a de Polignac number, because 13230405821 - 2¹⁰ = 13230404797 is a prime.

Together with 13230405823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13230405823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615202910 + 6615202911.

It is an arithmetic number, because the mean of its divisors is an integer number (6615202911).

Almost surely, 2^13230405821 is an apocalyptic number.

It is an amenable number.

13230405821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13230405821 is an equidigital number, since it uses as much as digits as its factorization.

13230405821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 13230405821 in words is "thirteen billion, two hundred thirty million, four hundred five thousand, eight hundred twenty-one".