11151221045566 has 32 divisors (see below), whose sum is σ = 19415773536768. Its totient is φ = 4704455458080.

The previous prime is 11151221045563. The next prime is 11151221045597. The reversal of 11151221045566 is 66554012215111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11151221045563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8084445 + ... + 9362728.

It is an arithmetic number, because the mean of its divisors is an integer number (606742923024).

Almost surely, 2^{11151221045566} is an apocalyptic number.

11151221045566 is a deficient number, since it is larger than the sum of its proper divisors (8264552491202).

11151221045566 is a wasteful number, since it uses less digits than its factorization.

11151221045566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17447896.

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 11151221045566 in words is "eleven trillion, one hundred fifty-one billion, two hundred twenty-one million, forty-five thousand, five hundred sixty-six".