1121217288 has 32 divisors (see below), whose sum is σ = 2817578400. Its totient is φ = 371801088.

The previous prime is 1121217287. The next prime is 1121217311. The reversal of 1121217288 is 8827121211.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1121217281) 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, 116398 + ... + 125661.

It is an arithmetic number, because the mean of its divisors is an integer number (88049325).

Almost surely, 2^1121217288 is an apocalyptic number.

It is an amenable number.

1121217288 is an abundant number, since it is smaller than the sum of its proper divisors (1696361112).

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

1121217288 is a wasteful number, since it uses less digits than its factorization.

1121217288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242261 (or 242257 counting only the distinct ones).

The product of its digits is 3584, while the sum is 33.

The square root of 1121217288 is about 33484.5828404656. The cubic root of 1121217288 is about 1038.8749199063.

Adding to 1121217288 its reverse (8827121211), we get a palindrome (9948338499).

The spelling of 1121217288 in words is "one billion, one hundred twenty-one million, two hundred seventeen thousand, two hundred eighty-eight".