21144004212323 has 2 divisors, whose sum is σ = 21144004212324. Its totient is φ = 21144004212322.

The previous prime is 21144004212257. The next prime is 21144004212329. The reversal of 21144004212323 is 32321240044112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21144004212323 is a prime.

It is not a weakly prime, because it can be changed into another prime (21144004212329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572002106161 + 10572002106162.

It is an arithmetic number, because the mean of its divisors is an integer number (10572002106162).

Almost surely, 2^{21144004212323} is an apocalyptic number.

21144004212323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144004212323 is an equidigital number, since it uses as much as digits as its factorization.

21144004212323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21144004212323 its reverse (32321240044112), we get a palindrome (53465244256435).

The spelling of 21144004212323 in words is "twenty-one trillion, one hundred forty-four billion, four million, two hundred twelve thousand, three hundred twenty-three".