1216322440113 has 64 divisors (see below), whose sum is σ = 1813655061504. Its totient is φ = 718859232000.

The previous prime is 1216322440111. The next prime is 1216322440133. The reversal of 1216322440113 is 3110442236121.

It is not a de Polignac number, because 1216322440113 - 2¹ = 1216322440111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216322440111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 454358931 + ... + 454361607.

It is an arithmetic number, because the mean of its divisors is an integer number (28338360336).

Almost surely, 2^{1216322440113} is an apocalyptic number.

It is an amenable number.

1216322440113 is a deficient number, since it is larger than the sum of its proper divisors (597332621391).

1216322440113 is a wasteful number, since it uses less digits than its factorization.

1216322440113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 1216322440113 its reverse (3110442236121), we get a palindrome (4326764676234).

The spelling of 1216322440113 in words is "one trillion, two hundred sixteen billion, three hundred twenty-two million, four hundred forty thousand, one hundred thirteen".