11513032220561 has 4 divisors (see below), whose sum is σ = 11513448286692. Its totient is φ = 11512616154432.

The previous prime is 11513032220539. The next prime is 11513032220563. The reversal of 11513032220561 is 16502223031511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3282416321536 + 8230615899025 = 1811744^2 + 2868905^2 .

It is a cyclic number.

It is not a de Polignac number, because 11513032220561 - 2³⁴ = 11495852351377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11513032220563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207991556 + ... + 208046901.

It is an arithmetic number, because the mean of its divisors is an integer number (2878362071673).

Almost surely, 2^{11513032220561} is an apocalyptic number.

It is an amenable number.

11513032220561 is a deficient number, since it is larger than the sum of its proper divisors (416066131).

11513032220561 is an equidigital number, since it uses as much as digits as its factorization.

11513032220561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416066130.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 11513032220561 in words is "eleven trillion, five hundred thirteen billion, thirty-two million, two hundred twenty thousand, five hundred sixty-one".