11131223566 has 16 divisors (see below), whose sum is σ = 17425044000. Its totient is φ = 5322938368.

The previous prime is 11131223533. The next prime is 11131223567. The reversal of 11131223566 is 66532213111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131223567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618990 + ... + 636718.

It is an arithmetic number, because the mean of its divisors is an integer number (1089065250).

Almost surely, 2^11131223566 is an apocalyptic number.

11131223566 is a deficient number, since it is larger than the sum of its proper divisors (6293820434).

11131223566 is a wasteful number, since it uses less digits than its factorization.

11131223566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31403.

The product of its digits is 6480, while the sum is 31.

Adding to 11131223566 its reverse (66532213111), we get a palindrome (77663436677).

The spelling of 11131223566 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-three thousand, five hundred sixty-six".