12421025889 has 4 divisors (see below), whose sum is σ = 16561367856. Its totient is φ = 8280683924.

The previous prime is 12421025867. The next prime is 12421025923. The reversal of 12421025889 is 98852012421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98852012421 = 3 ⋅32950670807.

It is a cyclic number.

It is not a de Polignac number, because 12421025889 - 2¹⁵ = 12420993121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12421025889.

It is not an unprimeable number, because it can be changed into a prime (12421025839) 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, 2070170979 + ... + 2070170984.

It is an arithmetic number, because the mean of its divisors is an integer number (4140341964).

Almost surely, 2^12421025889 is an apocalyptic number.

It is an amenable number.

12421025889 is a deficient number, since it is larger than the sum of its proper divisors (4140341967).

12421025889 is an equidigital number, since it uses as much as digits as its factorization.

12421025889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140341966.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 12421025889 in words is "twelve billion, four hundred twenty-one million, twenty-five thousand, eight hundred eighty-nine".