12451521225 has 192 divisors, whose sum is σ = 26446307328. Its totient is φ = 5073408000.

The previous prime is 12451521217. The next prime is 12451521253. The reversal of 12451521225 is 52212515421.

It is not a de Polignac number, because 12451521225 - 2³ = 12451521217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12451521192 and 12451521201.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5650974 + ... + 5653176.

It is an arithmetic number, because the mean of its divisors is an integer number (137741184).

Almost surely, 2^12451521225 is an apocalyptic number.

12451521225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12451521225 is an abundant number, since it is smaller than the sum of its proper divisors (13994786103).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12451521225 is a wasteful number, since it uses less digits than its factorization.

12451521225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 2283 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The spelling of 12451521225 in words is "twelve billion, four hundred fifty-one million, five hundred twenty-one thousand, two hundred twenty-five".