21013231103323 has 2 divisors, whose sum is σ = 21013231103324. Its totient is φ = 21013231103322.

The previous prime is 21013231103131. The next prime is 21013231103357. The reversal of 21013231103323 is 32330113231012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21013231103323 is a prime.

It is a super-2 number, since 2×21013231103323² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21013231109323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506615551661 + 10506615551662.

It is an arithmetic number, because the mean of its divisors is an integer number (10506615551662).

Almost surely, 2^{21013231103323} is an apocalyptic number.

21013231103323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013231103323 is an equidigital number, since it uses as much as digits as its factorization.

21013231103323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21013231103323 its reverse (32330113231012), we get a palindrome (53343344334335).

The spelling of 21013231103323 in words is "twenty-one trillion, thirteen billion, two hundred thirty-one million, one hundred three thousand, three hundred twenty-three".