23121813225 has 24 divisors (see below), whose sum is σ = 43689217600. Its totient is φ = 10569971520.

The previous prime is 23121813223. The next prime is 23121813263. The reversal of 23121813225 is 52231812132.

It is not a de Polignac number, because 23121813225 - 2¹ = 23121813223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23121813192 and 23121813201.

It is not an unprimeable number, because it can be changed into a prime (23121813223) 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 in 23 ways as a sum of consecutive naturals, for example, 22020250 + ... + 22021299.

Almost surely, 2^23121813225 is an apocalyptic number.

23121813225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23121813225 is a deficient number, since it is larger than the sum of its proper divisors (20567404375).

23121813225 is a wasteful number, since it uses less digits than its factorization.

23121813225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44041569 (or 44041564 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The spelling of 23121813225 in words is "twenty-three billion, one hundred twenty-one million, eight hundred thirteen thousand, two hundred twenty-five".