1216110472045 has 16 divisors (see below), whose sum is σ = 1677795533568. Its totient is φ = 828910880640.

The previous prime is 1216110471967. The next prime is 1216110472063. The reversal of 1216110472045 is 5402740116121.

It is not a de Polignac number, because 1216110472045 - 2¹⁹ = 1216109947757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1216110472045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104024136 + ... + 104035825.

It is an arithmetic number, because the mean of its divisors is an integer number (104862220848).

Almost surely, 2^{1216110472045} is an apocalyptic number.

It is an amenable number.

1216110472045 is a deficient number, since it is larger than the sum of its proper divisors (461685061523).

1216110472045 is a wasteful number, since it uses less digits than its factorization.

1216110472045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208060140.

The product of its (nonzero) digits is 13440, while the sum is 34.

Adding to 1216110472045 its reverse (5402740116121), we get a palindrome (6618850588166).

The spelling of 1216110472045 in words is "one trillion, two hundred sixteen billion, one hundred ten million, four hundred seventy-two thousand, forty-five".