1121312208 has 120 divisors (see below), whose sum is σ = 3083710368. Its totient is φ = 351039744.

The previous prime is 1121312207. The next prime is 1121312209. The reversal of 1121312208 is 8022131211.

It is an interprime number because it is at equal distance from previous prime (1121312207) and next prime (1121312209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121312207) 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, 2824266 + ... + 2824662.

Almost surely, 2^1121312208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121312208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1541855184).

1121312208 is an abundant number, since it is smaller than the sum of its proper divisors (1962398160).

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

1121312208 is a wasteful number, since it uses less digits than its factorization.

1121312208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1121312208 is about 33486.0001791794. Note that the first 3 decimals coincide. The cubic root of 1121312208 is about 1038.9042354326.

Adding to 1121312208 its reverse (8022131211), we get a palindrome (9143443419).

The spelling of 1121312208 in words is "one billion, one hundred twenty-one million, three hundred twelve thousand, two hundred eight".