11001220988 has 12 divisors (see below), whose sum is σ = 20089186320. Its totient is φ = 5261453472.

The previous prime is 11001220987. The next prime is 11001221003. The reversal of 11001220988 is 88902210011.

It is a super-2 number, since 2×11001220988² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 59789153 + ... + 59789336.

It is an arithmetic number, because the mean of its divisors is an integer number (1674098860).

Almost surely, 2^11001220988 is an apocalyptic number.

It is an amenable number.

11001220988 is a deficient number, since it is larger than the sum of its proper divisors (9087965332).

11001220988 is a wasteful number, since it uses less digits than its factorization.

11001220988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119578516 (or 119578514 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

Adding to 11001220988 its reverse (88902210011), we get a palindrome (99903430999).

The spelling of 11001220988 in words is "eleven billion, one million, two hundred twenty thousand, nine hundred eighty-eight".