12512109538444 has 12 divisors (see below), whose sum is σ = 22602520456768. Its totient is φ = 6054246550800.

The previous prime is 12512109538399. The next prime is 12512109538477. The reversal of 12512109538444 is 44483590121521.

It is a happy number.

It is a super-2 number, since 2×12512109538444² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50452054467 + ... + 50452054714.

Almost surely, 2^{12512109538444} is an apocalyptic number.

It is an amenable number.

12512109538444 is a deficient number, since it is larger than the sum of its proper divisors (10090410918324).

12512109538444 is a wasteful number, since it uses less digits than its factorization.

12512109538444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100904109216 (or 100904109214 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

Adding to 12512109538444 its reverse (44483590121521), we get a palindrome (56995699659965).

The spelling of 12512109538444 in words is "twelve trillion, five hundred twelve billion, one hundred nine million, five hundred thirty-eight thousand, four hundred forty-four".