1121111866 has 12 divisors (see below), whose sum is σ = 1956225978. Its totient is φ = 480476472.

The previous prime is 1121111861. The next prime is 1121111897. The reversal of 1121111866 is 6681111211.

It can be written as a sum of positive squares in only one way, i.e., 801739225 + 319372641 = 28315^2 + 17871^2 .

It is not an unprimeable number, because it can be changed into a prime (1121111861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5719861 + ... + 5720056.

Almost surely, 2^1121111866 is an apocalyptic number.

1121111866 is a deficient number, since it is larger than the sum of its proper divisors (835114112).

1121111866 is a wasteful number, since it uses less digits than its factorization.

1121111866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439933 (or 11439926 counting only the distinct ones).

The product of its digits is 576, while the sum is 28.

The square root of 1121111866 is about 33483.0086163116. The cubic root of 1121111866 is about 1038.8423589550.

The spelling of 1121111866 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, eight hundred sixty-six".