1213420004224 has 64 divisors (see below), whose sum is σ = 2523907584000. Its totient is φ = 579998909952.

The previous prime is 1213420004221. The next prime is 1213420004249. The reversal of 1213420004224 is 4224000243121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213420004221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5061337 + ... + 5295655.

It is an arithmetic number, because the mean of its divisors is an integer number (39436056000).

Almost surely, 2^{1213420004224} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213420004224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261953792000).

1213420004224 is an abundant number, since it is smaller than the sum of its proper divisors (1310487579776).

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

1213420004224 is a wasteful number, since it uses less digits than its factorization.

1213420004224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236115 (or 236103 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1213420004224 its reverse (4224000243121), we get a palindrome (5437420247345).

The spelling of 1213420004224 in words is "one trillion, two hundred thirteen billion, four hundred twenty million, four thousand, two hundred twenty-four".