12501120545 has 4 divisors (see below), whose sum is σ = 15001344660. Its totient is φ = 10000896432.

The previous prime is 12501120529. The next prime is 12501120557. The reversal of 12501120545 is 54502110521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6954892816 + 5546227729 = 83396^2 + 74473^2 .

It is a cyclic number.

It is not a de Polignac number, because 12501120545 - 2⁴ = 12501120529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250112050 + ... + 1250112059.

It is an arithmetic number, because the mean of its divisors is an integer number (3750336165).

Almost surely, 2^12501120545 is an apocalyptic number.

It is an amenable number.

12501120545 is a deficient number, since it is larger than the sum of its proper divisors (2500224115).

12501120545 is an equidigital number, since it uses as much as digits as its factorization.

12501120545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500224114.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 12501120545 in words is "twelve billion, five hundred one million, one hundred twenty thousand, five hundred forty-five".