12340210421 has 24 divisors (see below), whose sum is σ = 16484153760. Its totient is φ = 9109648800.

The previous prime is 12340210411. The next prime is 12340210423. The reversal of 12340210421 is 12401204321.

It is not a de Polignac number, because 12340210421 - 2⁶ = 12340210357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12340210393 and 12340210402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340210423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 592250 + ... + 612731.

It is an arithmetic number, because the mean of its divisors is an integer number (686839740).

Almost surely, 2^12340210421 is an apocalyptic number.

12340210421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12340210421 is a deficient number, since it is larger than the sum of its proper divisors (4143943339).

12340210421 is a wasteful number, since it uses less digits than its factorization.

12340210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205025 (or 1205018 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12340210421 its reverse (12401204321), we get a palindrome (24741414742).

The spelling of 12340210421 in words is "twelve billion, three hundred forty million, two hundred ten thousand, four hundred twenty-one".