12240512561 has 8 divisors (see below), whose sum is σ = 12383748000. Its totient is φ = 12097404000.

The previous prime is 12240512549. The next prime is 12240512579. The reversal of 12240512561 is 16521504221.

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 12240512561 - 2¹⁸ = 12240250417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12240512461) 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, 169790 + ... + 230888.

It is an arithmetic number, because the mean of its divisors is an integer number (1547968500).

Almost surely, 2^12240512561 is an apocalyptic number.

It is an amenable number.

12240512561 is a deficient number, since it is larger than the sum of its proper divisors (143235439).

12240512561 is an equidigital number, since it uses as much as digits as its factorization.

12240512561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63439.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 12240512561 in words is "twelve billion, two hundred forty million, five hundred twelve thousand, five hundred sixty-one".