12521011012026 has 16 divisors (see below), whose sum is σ = 27318569480928. Its totient is φ = 3794245761200.

The previous prime is 12521011012007. The next prime is 12521011012043. The reversal of 12521011012026 is 62021011012521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12521011011987 and 12521011012005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94856143965 + ... + 94856144096.

It is an arithmetic number, because the mean of its divisors is an integer number (1707410592558).

Almost surely, 2^{12521011012026} is an apocalyptic number.

12521011012026 is an abundant number, since it is smaller than the sum of its proper divisors (14797558468902).

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

12521011012026 is a wasteful number, since it uses less digits than its factorization.

12521011012026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189712288077.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 12521011012026 its reverse (62021011012521), we get a palindrome (74542022024547).

The spelling of 12521011012026 in words is "twelve trillion, five hundred twenty-one billion, eleven million, twelve thousand, twenty-six".