12560135621 has 8 divisors (see below), whose sum is σ = 13710448800. Its totient is φ = 11411236240.

The previous prime is 12560135597. The next prime is 12560135633. The reversal of 12560135621 is 12653106521.

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

It is a cyclic number.

It is not a de Polignac number, because 12560135621 - 2⁶ = 12560135557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12560137621) 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, 334826 + ... + 370443.

It is an arithmetic number, because the mean of its divisors is an integer number (1713806100).

Almost surely, 2^12560135621 is an apocalyptic number.

12560135621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12560135621 is a deficient number, since it is larger than the sum of its proper divisors (1150313179).

12560135621 is a wasteful number, since it uses less digits than its factorization.

12560135621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706899.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 12560135621 in words is "twelve billion, five hundred sixty million, one hundred thirty-five thousand, six hundred twenty-one".