12355433421 has 8 divisors (see below), whose sum is σ = 16919152224. Its totient is φ = 8014335120.

The previous prime is 12355433357. The next prime is 12355433437. The reversal of 12355433421 is 12433455321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12355433421 - 2⁶ = 12355433357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12355433471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55654995 + ... + 55655216.

It is an arithmetic number, because the mean of its divisors is an integer number (2114894028).

Almost surely, 2^12355433421 is an apocalyptic number.

It is an amenable number.

12355433421 is a deficient number, since it is larger than the sum of its proper divisors (4563718803).

12355433421 is a wasteful number, since it uses less digits than its factorization.

12355433421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111310251.

The product of its digits is 43200, while the sum is 33.

Adding to 12355433421 its reverse (12433455321), we get a palindrome (24788888742).

The spelling of 12355433421 in words is "twelve billion, three hundred fifty-five million, four hundred thirty-three thousand, four hundred twenty-one".