1216304401404 has 12 divisors (see below), whose sum is σ = 2838043603304. Its totient is φ = 405434800464.

The previous prime is 1216304401387. The next prime is 1216304401441. The reversal of 1216304401404 is 4041044036121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50679350047 + ... + 50679350070.

Almost surely, 2^{1216304401404} is an apocalyptic number.

It is an amenable number.

1216304401404 is an abundant number, since it is smaller than the sum of its proper divisors (1621739201900).

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

1216304401404 is a wasteful number, since it uses less digits than its factorization.

1216304401404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101358700124 (or 101358700122 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 1216304401404 its reverse (4041044036121), we get a palindrome (5257348437525).

The spelling of 1216304401404 in words is "one trillion, two hundred sixteen billion, three hundred four million, four hundred one thousand, four hundred four".