13011221313618 has 48 divisors (see below), whose sum is σ = 28642526028480. Its totient is φ = 3937370801760.

The previous prime is 13011221313529. The next prime is 13011221313619. The reversal of 13011221313618 is 81631312211031.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (13011221313619) 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 23 ways as a sum of consecutive naturals, for example, 11798053 + ... + 12853656.

It is an arithmetic number, because the mean of its divisors is an integer number (596719292260).

Almost surely, 2^{13011221313618} is an apocalyptic number.

13011221313618 is an abundant number, since it is smaller than the sum of its proper divisors (15631304714862).

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

13011221313618 is a wasteful number, since it uses less digits than its factorization.

13011221313618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24652463 (or 24652452 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

Adding to 13011221313618 its reverse (81631312211031), we get a palindrome (94642533524649).

The spelling of 13011221313618 in words is "thirteen trillion, eleven billion, two hundred twenty-one million, three hundred thirteen thousand, six hundred eighteen".