1121712018 has 48 divisors (see below), whose sum is σ = 2670418080. Its totient is φ = 313032384.

The previous prime is 1121711999. The next prime is 1121712019. The reversal of 1121712018 is 8102171211.

It is not an unprimeable number, because it can be changed into a prime (1121712019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31723 + ... + 57006.

It is an arithmetic number, because the mean of its divisors is an integer number (55633710).

Almost surely, 2^1121712018 is an apocalyptic number.

1121712018 is an abundant number, since it is smaller than the sum of its proper divisors (1548706062).

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

1121712018 is a wasteful number, since it uses less digits than its factorization.

1121712018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88791 (or 88784 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 24.

The square root of 1121712018 is about 33491.9694553784. The cubic root of 1121712018 is about 1039.0276964224.

Adding to 1121712018 its reverse (8102171211), we get a palindrome (9223883229).

The spelling of 1121712018 in words is "one billion, one hundred twenty-one million, seven hundred twelve thousand, eighteen".