23121204453 has 6 divisors (see below), whose sum is σ = 33397295334. Its totient is φ = 15414136296.

The previous prime is 23121204437. The next prime is 23121204493. The reversal of 23121204453 is 35440212132.

23121204453 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 1 + 204 + 453 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20914365924 + 2206838529 = 144618^2 + 46977^2 .

It is not a de Polignac number, because 23121204453 - 2⁴ = 23121204437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121204493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1284511350 + ... + 1284511367.

It is an arithmetic number, because the mean of its divisors is an integer number (5566215889).

Almost surely, 2^23121204453 is an apocalyptic number.

It is an amenable number.

23121204453 is a deficient number, since it is larger than the sum of its proper divisors (10276090881).

23121204453 is a wasteful number, since it uses less digits than its factorization.

23121204453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569022723 (or 2569022720 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 23121204453 its reverse (35440212132), we get a palindrome (58561416585).

The spelling of 23121204453 in words is "twenty-three billion, one hundred twenty-one million, two hundred four thousand, four hundred fifty-three".