23404111244221 has 2 divisors, whose sum is σ = 23404111244222. Its totient is φ = 23404111244220.

The previous prime is 23404111244209. The next prime is 23404111244257. The reversal of 23404111244221 is 12244211140432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22165311080025 + 1238800164196 = 4708005^2 + 1113014^2 .

It is a cyclic number.

It is not a de Polignac number, because 23404111244221 - 2³⁷ = 23266672290749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23404111844221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11702055622110 + 11702055622111.

It is an arithmetic number, because the mean of its divisors is an integer number (11702055622111).

Almost surely, 2^{23404111244221} is an apocalyptic number.

It is an amenable number.

23404111244221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23404111244221 is an equidigital number, since it uses as much as digits as its factorization.

23404111244221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 23404111244221 its reverse (12244211140432), we get a palindrome (35648322384653).

The spelling of 23404111244221 in words is "twenty-three trillion, four hundred four billion, one hundred eleven million, two hundred forty-four thousand, two hundred twenty-one".