11001220984 has 32 divisors (see below), whose sum is σ = 22218366240. Its totient is φ = 5076489600.

The previous prime is 11001220981. The next prime is 11001220987. The reversal of 11001220984 is 48902210011.

It is an interprime number because it is at equal distance from previous prime (11001220981) and next prime (11001220987).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001220981) 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, 923949 + ... + 935779.

It is an arithmetic number, because the mean of its divisors is an integer number (694323945).

Almost surely, 2^11001220984 is an apocalyptic number.

It is an amenable number.

11001220984 is an abundant number, since it is smaller than the sum of its proper divisors (11217145256).

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

11001220984 is a wasteful number, since it uses less digits than its factorization.

11001220984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20791 (or 20787 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

Adding to 11001220984 its reverse (48902210011), we get a palindrome (59903430995).

The spelling of 11001220984 in words is "eleven billion, one million, two hundred twenty thousand, nine hundred eighty-four".