1155044103213 has 96 divisors (see below), whose sum is σ = 2139201332352. Its totient is φ = 544786905600.

The previous prime is 1155044103211. The next prime is 1155044103217. The reversal of 1155044103213 is 3123014405511.

It is not a de Polignac number, because 1155044103213 - 2¹ = 1155044103211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155044103211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 831895 + ... + 1732667.

It is an arithmetic number, because the mean of its divisors is an integer number (22283347212).

Almost surely, 2^{1155044103213} is an apocalyptic number.

1155044103213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1155044103213 is a deficient number, since it is larger than the sum of its proper divisors (984157229139).

1155044103213 is a wasteful number, since it uses less digits than its factorization.

1155044103213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900875 (or 900868 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1155044103213 its reverse (3123014405511), we get a palindrome (4278058508724).

The spelling of 1155044103213 in words is "one trillion, one hundred fifty-five billion, forty-four million, one hundred three thousand, two hundred thirteen".