23521421333 has 2 divisors, whose sum is σ = 23521421334. Its totient is φ = 23521421332.

The previous prime is 23521421327. The next prime is 23521421353. The reversal of 23521421333 is 33312412532.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22242143044 + 1279278289 = 149138^2 + 35767^2 .

It is a cyclic number.

It is not a de Polignac number, because 23521421333 - 2¹⁰ = 23521420309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23521421296 and 23521421305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23521421353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760710666 + 11760710667.

It is an arithmetic number, because the mean of its divisors is an integer number (11760710667).

Almost surely, 2^23521421333 is an apocalyptic number.

It is an amenable number.

23521421333 is a deficient number, since it is larger than the sum of its proper divisors (1).

23521421333 is an equidigital number, since it uses as much as digits as its factorization.

23521421333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 29.

Adding to 23521421333 its reverse (33312412532), we get a palindrome (56833833865).

The spelling of 23521421333 in words is "twenty-three billion, five hundred twenty-one million, four hundred twenty-one thousand, three hundred thirty-three".