12521225225 has 12 divisors (see below), whose sum is σ = 15573236880. Its totient is φ = 9986710800.

The previous prime is 12521225219. The next prime is 12521225261. The reversal of 12521225225 is 52252212521.

It is not a de Polignac number, because 12521225225 - 2¹⁴ = 12521208841 is a prime.

It is a super-2 number, since 2×12521225225² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 748295 + ... + 764844.

It is an arithmetic number, because the mean of its divisors is an integer number (1297769740).

Almost surely, 2^12521225225 is an apocalyptic number.

It is an amenable number.

12521225225 is a deficient number, since it is larger than the sum of its proper divisors (3052011655).

12521225225 is a wasteful number, since it uses less digits than its factorization.

12521225225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513480 (or 1513475 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

Adding to 12521225225 its reverse (52252212521), we get a palindrome (64773437746).

The spelling of 12521225225 in words is "twelve billion, five hundred twenty-one million, two hundred twenty-five thousand, two hundred twenty-five".