1216304401434 has 32 divisors (see below), whose sum is σ = 2471172606720. Its totient is φ = 399039880512.

The previous prime is 1216304401387. The next prime is 1216304401441. The reversal of 1216304401434 is 4341044036121.

It is a junction number, because it is equal to n+sod(n) for n = 1216304401395 and 1216304401404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3897129 + ... + 4197644.

It is an arithmetic number, because the mean of its divisors is an integer number (77224143960).

Almost surely, 2^{1216304401434} is an apocalyptic number.

1216304401434 is an abundant number, since it is smaller than the sum of its proper divisors (1254868205286).

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

1216304401434 is a wasteful number, since it uses less digits than its factorization.

1216304401434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8095174.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 1216304401434 its reverse (4341044036121), we get a palindrome (5557348437555).

The spelling of 1216304401434 in words is "one trillion, two hundred sixteen billion, three hundred four million, four hundred one thousand, four hundred thirty-four".