1121559120 has 480 divisors, whose sum is σ = 4412289024. Its totient is φ = 252595200.

The previous prime is 1121559119. The next prime is 1121559121. The reversal of 1121559120 is 219551211.

It is an interprime number because it is at equal distance from previous prime (1121559119) and next prime (1121559121).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121559121) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8561455 + ... + 8561585.

Almost surely, 2^1121559120 is an apocalyptic number.

1121559120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121559120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2206144512).

1121559120 is an abundant number, since it is smaller than the sum of its proper divisors (3290729904).

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

1121559120 is a wasteful number, since it uses less digits than its factorization.

1121559120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 1121559120 is about 33489.6867707060. The cubic root of 1121559120 is about 1038.9804851142.

The spelling of 1121559120 in words is "one billion, one hundred twenty-one million, five hundred fifty-nine thousand, one hundred twenty".