21312044021363 has 2 divisors, whose sum is σ = 21312044021364. Its totient is φ = 21312044021362.

The previous prime is 21312044021293. The next prime is 21312044021399. The reversal of 21312044021363 is 36312044021312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21312044021363 - 2¹⁰ = 21312044020339 is a prime.

It is not a weakly prime, because it can be changed into another prime (21312044021263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656022010681 + 10656022010682.

It is an arithmetic number, because the mean of its divisors is an integer number (10656022010682).

Almost surely, 2^{21312044021363} is an apocalyptic number.

21312044021363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312044021363 is an equidigital number, since it uses as much as digits as its factorization.

21312044021363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 21312044021363 its reverse (36312044021312), we get a palindrome (57624088042675).

The spelling of 21312044021363 in words is "twenty-one trillion, three hundred twelve billion, forty-four million, twenty-one thousand, three hundred sixty-three".