12320143421 has 4 divisors (see below), whose sum is σ = 12324019644. Its totient is φ = 12316267200.

The previous prime is 12320143397. The next prime is 12320143427. The reversal of 12320143421 is 12434102321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2101764025 + 10218379396 = 45845^2 + 101086^2 .

It is a cyclic number.

It is not a de Polignac number, because 12320143421 - 2¹⁴ = 12320127037 is a prime.

It is a super-3 number, since 3×12320143421³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320143427) 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, 1933340 + ... + 1939701.

It is an arithmetic number, because the mean of its divisors is an integer number (3081004911).

Almost surely, 2^12320143421 is an apocalyptic number.

It is an amenable number.

12320143421 is a deficient number, since it is larger than the sum of its proper divisors (3876223).

12320143421 is an equidigital number, since it uses as much as digits as its factorization.

12320143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876222.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12320143421 its reverse (12434102321), we get a palindrome (24754245742).

The spelling of 12320143421 in words is "twelve billion, three hundred twenty million, one hundred forty-three thousand, four hundred twenty-one".