12421338077 has 4 divisors (see below), whose sum is σ = 12476057856. Its totient is φ = 12366618300.

The previous prime is 12421338047. The next prime is 12421338089. The reversal of 12421338077 is 77083312421.

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 a cyclic number.

It is not a de Polignac number, because 12421338077 - 2¹⁰ = 12421337053 is a prime.

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 12421338077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421338047) 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, 27359549 + ... + 27360002.

It is an arithmetic number, because the mean of its divisors is an integer number (3119014464).

Almost surely, 2^12421338077 is an apocalyptic number.

It is an amenable number.

12421338077 is a deficient number, since it is larger than the sum of its proper divisors (54719779).

12421338077 is an equidigital number, since it uses as much as digits as its factorization.

12421338077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54719778.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 12421338077 in words is "twelve billion, four hundred twenty-one million, three hundred thirty-eight thousand, seventy-seven".