12521107422 has 24 divisors (see below), whose sum is σ = 27311146200. Its totient is φ = 4145690160.

The previous prime is 12521107373. The next prime is 12521107429. The reversal of 12521107422 is 22470112521.

It is a happy number.

12521107422 is a `hidden beast` number, since 1 + 25 + 211 + 0 + 7 + 422 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521107429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2331604 + ... + 2336967.

It is an arithmetic number, because the mean of its divisors is an integer number (1137964425).

Almost surely, 2^12521107422 is an apocalyptic number.

12521107422 is an abundant number, since it is smaller than the sum of its proper divisors (14790038778).

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

12521107422 is a wasteful number, since it uses less digits than its factorization.

12521107422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668728 (or 4668725 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

Adding to 12521107422 its reverse (22470112521), we get a palindrome (34991219943).

The spelling of 12521107422 in words is "twelve billion, five hundred twenty-one million, one hundred seven thousand, four hundred twenty-two".