11113316221566 has 64 divisors (see below), whose sum is σ = 23975888122368. Its totient is φ = 3413839575168.

The previous prime is 11113316221499. The next prime is 11113316221573. The reversal of 11113316221566 is 66512261331111.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222432660 + ... + 222482616.

It is an arithmetic number, because the mean of its divisors is an integer number (374623251912).

Almost surely, 2^{11113316221566} is an apocalyptic number.

11113316221566 is an abundant number, since it is smaller than the sum of its proper divisors (12862571900802).

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

11113316221566 is a wasteful number, since it uses less digits than its factorization.

11113316221566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54625.

The product of its digits is 38880, while the sum is 39.

Adding to 11113316221566 its reverse (66512261331111), we get a palindrome (77625577552677).

The spelling of 11113316221566 in words is "eleven trillion, one hundred thirteen billion, three hundred sixteen million, two hundred twenty-one thousand, five hundred sixty-six".