13231300021 has 2 divisors, whose sum is σ = 13231300022. Its totient is φ = 13231300020.

The previous prime is 13231300007. The next prime is 13231300067. The reversal of 13231300021 is 12000313231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9149879025 + 4081420996 = 95655^2 + 63886^2 .

It is an emirp because it is prime and its reverse (12000313231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13231300021 - 2⁵ = 13231299989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13231299968 and 13231300004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13231300001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615650010 + 6615650011.

It is an arithmetic number, because the mean of its divisors is an integer number (6615650011).

Almost surely, 2^13231300021 is an apocalyptic number.

It is an amenable number.

13231300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231300021 is an equidigital number, since it uses as much as digits as its factorization.

13231300021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 13231300021 its reverse (12000313231), we get a palindrome (25231613252).

The spelling of 13231300021 in words is "thirteen billion, two hundred thirty-one million, three hundred thousand, twenty-one".