21233011013 has 2 divisors, whose sum is σ = 21233011014. Its totient is φ = 21233011012.

The previous prime is 21233010991. The next prime is 21233011049. The reversal of 21233011013 is 31011033212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18790378084 + 2442632929 = 137078^2 + 49423^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233011013 - 2¹⁰ = 21233009989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21233010982 and 21233011000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233011213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616505506 + 10616505507.

It is an arithmetic number, because the mean of its divisors is an integer number (10616505507).

Almost surely, 2^21233011013 is an apocalyptic number.

It is an amenable number.

21233011013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233011013 is an equidigital number, since it uses as much as digits as its factorization.

21233011013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21233011013 its reverse (31011033212), we get a palindrome (52244044225).

The spelling of 21233011013 in words is "twenty-one billion, two hundred thirty-three million, eleven thousand, thirteen".