23321105043421 has 2 divisors, whose sum is σ = 23321105043422. Its totient is φ = 23321105043420.

The previous prime is 23321105043373. The next prime is 23321105043443. The reversal of 23321105043421 is 12434050112332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20106381552196 + 3214723491225 = 4484014^2 + 1792965^2 .

It is a cyclic number.

It is not a de Polignac number, because 23321105043421 - 2¹¹ = 23321105041373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23321105043451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11660552521710 + 11660552521711.

It is an arithmetic number, because the mean of its divisors is an integer number (11660552521711).

Almost surely, 2^{23321105043421} is an apocalyptic number.

It is an amenable number.

23321105043421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23321105043421 is an equidigital number, since it uses as much as digits as its factorization.

23321105043421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 23321105043421 its reverse (12434050112332), we get a palindrome (35755155155753).

The spelling of 23321105043421 in words is "twenty-three trillion, three hundred twenty-one billion, one hundred five million, forty-three thousand, four hundred twenty-one".