23443210043221 has 2 divisors, whose sum is σ = 23443210043222. Its totient is φ = 23443210043220.

The previous prime is 23443210043219. The next prime is 23443210043257. The reversal of 23443210043221 is 12234001234432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14958631434321 + 8484578608900 = 3867639^2 + 2912830^2 .

It is a cyclic number.

It is not a de Polignac number, because 23443210043221 - 2¹ = 23443210043219 is a prime.

Together with 23443210043219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23443210043261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11721605021610 + 11721605021611.

It is an arithmetic number, because the mean of its divisors is an integer number (11721605021611).

Almost surely, 2^{23443210043221} is an apocalyptic number.

It is an amenable number.

23443210043221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23443210043221 is an equidigital number, since it uses as much as digits as its factorization.

23443210043221 is an evil number, because the sum of its binary digits is even.

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

Adding to 23443210043221 its reverse (12234001234432), we get a palindrome (35677211277653).

The spelling of 23443210043221 in words is "twenty-three trillion, four hundred forty-three billion, two hundred ten million, forty-three thousand, two hundred twenty-one".