12421557383 has 4 divisors (see below), whose sum is σ = 12423177648. Its totient is φ = 12419937120.

The previous prime is 12421557377. The next prime is 12421557397. The reversal of 12421557383 is 38375512421.

12421557383 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 38375512421 = 61 ⋅629106761.

It is a cyclic number.

It is not a de Polignac number, because 12421557383 - 2³⁰ = 11347815559 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 12421557383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14421557383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798578 + ... + 813983.

It is an arithmetic number, because the mean of its divisors is an integer number (3105794412).

Almost surely, 2^12421557383 is an apocalyptic number.

12421557383 is a deficient number, since it is larger than the sum of its proper divisors (1620265).

12421557383 is an equidigital number, since it uses as much as digits as its factorization.

12421557383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620264.

The product of its digits is 201600, while the sum is 41.

The spelling of 12421557383 in words is "twelve billion, four hundred twenty-one million, five hundred fifty-seven thousand, three hundred eighty-three".