12352440562421 has 4 divisors (see below), whose sum is σ = 12354067818144. Its totient is φ = 12350813306700.

The previous prime is 12352440562391. The next prime is 12352440562457. The reversal of 12352440562421 is 12426504425321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12352440562421 is a prime.

It is a super-3 number, since 3×12352440562421³ (a number of 40 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 (12352440562471) 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, 813616475 + ... + 813631656.

It is an arithmetic number, because the mean of its divisors is an integer number (3088516954536).

Almost surely, 2^{12352440562421} is an apocalyptic number.

It is an amenable number.

12352440562421 is a deficient number, since it is larger than the sum of its proper divisors (1627255723).

12352440562421 is an equidigital number, since it uses as much as digits as its factorization.

12352440562421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627255722.

The product of its (nonzero) digits is 460800, while the sum is 41.

Adding to 12352440562421 its reverse (12426504425321), we get a palindrome (24778944987742).

The spelling of 12352440562421 in words is "twelve trillion, three hundred fifty-two billion, four hundred forty million, five hundred sixty-two thousand, four hundred twenty-one".