11621236165213 has 4 divisors (see below), whose sum is σ = 11631584551168. Its totient is φ = 11610887779260.

The previous prime is 11621236165207. The next prime is 11621236165241. The reversal of 11621236165213 is 31256163212611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11621236165213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621236160213) 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 3 ways as a sum of consecutive naturals, for example, 5174191293 + ... + 5174193538.

It is an arithmetic number, because the mean of its divisors is an integer number (2907896137792).

Almost surely, 2^{11621236165213} is an apocalyptic number.

It is an amenable number.

11621236165213 is a deficient number, since it is larger than the sum of its proper divisors (10348385955).

11621236165213 is a wasteful number, since it uses less digits than its factorization.

11621236165213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10348385954.

The product of its digits is 77760, while the sum is 40.

Adding to 11621236165213 its reverse (31256163212611), we get a palindrome (42877399377824).

The spelling of 11621236165213 in words is "eleven trillion, six hundred twenty-one billion, two hundred thirty-six million, one hundred sixty-five thousand, two hundred thirteen".