21240324401323 has 2 divisors, whose sum is σ = 21240324401324. Its totient is φ = 21240324401322.

The previous prime is 21240324401273. The next prime is 21240324401369. The reversal of 21240324401323 is 32310442304212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21240324401323 - 2¹³ = 21240324393131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21240324401623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620162200661 + 10620162200662.

It is an arithmetic number, because the mean of its divisors is an integer number (10620162200662).

Almost surely, 2^{21240324401323} is an apocalyptic number.

21240324401323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21240324401323 is an equidigital number, since it uses as much as digits as its factorization.

21240324401323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21240324401323 its reverse (32310442304212), we get a palindrome (53550766705535).

The spelling of 21240324401323 in words is "twenty-one trillion, two hundred forty billion, three hundred twenty-four million, four hundred one thousand, three hundred twenty-three".