1121099616 has 480 divisors, whose sum is σ = 4183502400. Its totient is φ = 292626432.

The previous prime is 1121099611. The next prime is 1121099627. The reversal of 1121099616 is 6169901211.

1121099616 is a `hidden beast` number, since 11 + 21 + 0 + 9 + 9 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121099611) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11557680 + ... + 11557776.

It is an arithmetic number, because the mean of its divisors is an integer number (8715630).

Almost surely, 2^1121099616 is an apocalyptic number.

1121099616 is a gapful number since it is divisible by the number (16) 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 1121099616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091751200).

1121099616 is an abundant number, since it is smaller than the sum of its proper divisors (3062402784).

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

1121099616 is an equidigital number, since it uses as much as digits as its factorization.

1121099616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 1121099616 is about 33482.8256872087. The cubic root of 1121099616 is about 1038.8385752513.

The spelling of 1121099616 in words is "one billion, one hundred twenty-one million, ninety-nine thousand, six hundred sixteen".