12421303534 has 4 divisors (see below), whose sum is σ = 18631955304. Its totient is φ = 6210651766.

The previous prime is 12421303529. The next prime is 12421303537. The reversal of 12421303534 is 43530312421.

It is a happy number.

12421303534 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421303537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105325882 + ... + 3105325885.

It is an arithmetic number, because the mean of its divisors is an integer number (4657988826).

Almost surely, 2^12421303534 is an apocalyptic number.

12421303534 is a deficient number, since it is larger than the sum of its proper divisors (6210651770).

12421303534 is an equidigital number, since it uses as much as digits as its factorization.

12421303534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210651769.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 12421303534 its reverse (43530312421), we get a palindrome (55951615955).

The spelling of 12421303534 in words is "twelve billion, four hundred twenty-one million, three hundred three thousand, five hundred thirty-four".