23553121133 has 2 divisors, whose sum is σ = 23553121134. Its totient is φ = 23553121132.

The previous prime is 23553121093. The next prime is 23553121153. The reversal of 23553121133 is 33112135532.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16531016329 + 7022104804 = 128573^2 + 83798^2 .

It is a cyclic number.

It is not a de Polignac number, because 23553121133 - 2¹⁴ = 23553104749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23553121096 and 23553121105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23553121153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11776560566 + 11776560567.

It is an arithmetic number, because the mean of its divisors is an integer number (11776560567).

Almost surely, 2^23553121133 is an apocalyptic number.

It is an amenable number.

23553121133 is a deficient number, since it is larger than the sum of its proper divisors (1).

23553121133 is an equidigital number, since it uses as much as digits as its factorization.

23553121133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 29.

Adding to 23553121133 its reverse (33112135532), we get a palindrome (56665256665).

The spelling of 23553121133 in words is "twenty-three billion, five hundred fifty-three million, one hundred twenty-one thousand, one hundred thirty-three".