12521013045 has 8 divisors (see below), whose sum is σ = 20033620896. Its totient is φ = 6677873616.

The previous prime is 12521013041. The next prime is 12521013047. The reversal of 12521013045 is 54031012521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12521013045 - 2² = 12521013041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521013041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417367087 + ... + 417367116.

It is an arithmetic number, because the mean of its divisors is an integer number (2504202612).

Almost surely, 2^12521013045 is an apocalyptic number.

12521013045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12521013045 is a deficient number, since it is larger than the sum of its proper divisors (7512607851).

12521013045 is an equidigital number, since it uses as much as digits as its factorization.

12521013045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834734211.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 12521013045 its reverse (54031012521), we get a palindrome (66552025566).

The spelling of 12521013045 in words is "twelve billion, five hundred twenty-one million, thirteen thousand, forty-five".