23305543542121 has 2 divisors, whose sum is σ = 23305543542122. Its totient is φ = 23305543542120.

The previous prime is 23305543542097. The next prime is 23305543542217. The reversal of 23305543542121 is 12124534550332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23250864267225 + 54679274896 = 4821915^2 + 233836^2 .

It is a cyclic number.

It is not a de Polignac number, because 23305543542121 - 2⁵ = 23305543542089 is a prime.

It is not a weakly prime, because it can be changed into another prime (23305543342121) 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, 11652771771060 + 11652771771061.

It is an arithmetic number, because the mean of its divisors is an integer number (11652771771061).

Almost surely, 2^{23305543542121} is an apocalyptic number.

It is an amenable number.

23305543542121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23305543542121 is an equidigital number, since it uses as much as digits as its factorization.

23305543542121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 23305543542121 in words is "twenty-three trillion, three hundred five billion, five hundred forty-three million, five hundred forty-two thousand, one hundred twenty-one".