12420321204 has 24 divisors (see below), whose sum is σ = 30506052640. Its totient is φ = 3922206624.

The previous prime is 12420321187. The next prime is 12420321217. The reversal of 12420321204 is 40212302421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27237319 + ... + 27237774.

Almost surely, 2^12420321204 is an apocalyptic number.

It is an amenable number.

12420321204 is an abundant number, since it is smaller than the sum of its proper divisors (18085731436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12420321204 is a wasteful number, since it uses less digits than its factorization.

12420321204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54475119 (or 54475117 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12420321204 its reverse (40212302421), we get a palindrome (52632623625).

The spelling of 12420321204 in words is "twelve billion, four hundred twenty million, three hundred twenty-one thousand, two hundred four".