12521221202 has 16 divisors (see below), whose sum is σ = 21561211392. Its totient is φ = 5342172480.

The previous prime is 12521221189. The next prime is 12521221247. The reversal of 12521221202 is 20212212521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2002199 + ... + 2008442.

It is an arithmetic number, because the mean of its divisors is an integer number (1347575712).

Almost surely, 2^12521221202 is an apocalyptic number.

12521221202 is a deficient number, since it is larger than the sum of its proper divisors (9039990190).

12521221202 is a wasteful number, since it uses less digits than its factorization.

12521221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010873.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 12521221202 its reverse (20212212521), we get a palindrome (32733433723).

The spelling of 12521221202 in words is "twelve billion, five hundred twenty-one million, two hundred twenty-one thousand, two hundred two".