12500721253454 has 32 divisors (see below), whose sum is σ = 21781620619200. Its totient is φ = 5269502845440.

The previous prime is 12500721253441. The next prime is 12500721253477. The reversal of 12500721253454 is 45435212700521.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 43229702 + ... + 43517910.

It is an arithmetic number, because the mean of its divisors is an integer number (680675644350).

Almost surely, 2^{12500721253454} is an apocalyptic number.

12500721253454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12500721253454 is a deficient number, since it is larger than the sum of its proper divisors (9280899365746).

12500721253454 is a wasteful number, since it uses less digits than its factorization.

12500721253454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339068.

The product of its (nonzero) digits is 336000, while the sum is 41.

Adding to 12500721253454 its reverse (45435212700521), we get a palindrome (57935933953975).

The spelling of 12500721253454 in words is "twelve trillion, five hundred billion, seven hundred twenty-one million, two hundred fifty-three thousand, four hundred fifty-four".