12559364121 has 4 divisors (see below), whose sum is σ = 16745818832. Its totient is φ = 8372909412.

The previous prime is 12559364119. The next prime is 12559364131. The reversal of 12559364121 is 12146395521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12559364121 - 2¹ = 12559364119 is a prime.

It is a super-3 number, since 3×12559364121³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12559364121.

It is not an unprimeable number, because it can be changed into a prime (12559364131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2093227351 + ... + 2093227356.

It is an arithmetic number, because the mean of its divisors is an integer number (4186454708).

Almost surely, 2^12559364121 is an apocalyptic number.

It is an amenable number.

12559364121 is a deficient number, since it is larger than the sum of its proper divisors (4186454711).

12559364121 is an equidigital number, since it uses as much as digits as its factorization.

12559364121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186454710.

The product of its digits is 64800, while the sum is 39.

The spelling of 12559364121 in words is "twelve billion, five hundred fifty-nine million, three hundred sixty-four thousand, one hundred twenty-one".