12204244012421 has 16 divisors (see below), whose sum is σ = 13083151233600. Its totient is φ = 11343339487488.

The previous prime is 12204244012399. The next prime is 12204244012423. The reversal of 12204244012421 is 12421044240221.

It is a cyclic number.

It is not a de Polignac number, because 12204244012421 - 2²² = 12204239818117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12204244012423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1710935 + ... + 5228363.

It is an arithmetic number, because the mean of its divisors is an integer number (817696952100).

Almost surely, 2^{12204244012421} is an apocalyptic number.

It is an amenable number.

12204244012421 is a deficient number, since it is larger than the sum of its proper divisors (878907221179).

12204244012421 is a wasteful number, since it uses less digits than its factorization.

12204244012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519988.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 12204244012421 its reverse (12421044240221), we get a palindrome (24625288252642).

The spelling of 12204244012421 in words is "twelve trillion, two hundred four billion, two hundred forty-four million, twelve thousand, four hundred twenty-one".