11002221988 has 24 divisors (see below), whose sum is σ = 19311982200. Its totient is φ = 5484534528.

The previous prime is 11002221977. The next prime is 11002222009. The reversal of 11002221988 is 88912220011.

It can be written as a sum of positive squares in 4 ways, for example, as 3653960704 + 7348261284 = 60448^2 + 85722^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3780678 + ... + 3783586.

It is an arithmetic number, because the mean of its divisors is an integer number (804665925).

Almost surely, 2^11002221988 is an apocalyptic number.

It is an amenable number.

11002221988 is a deficient number, since it is larger than the sum of its proper divisors (8309760212).

11002221988 is a wasteful number, since it uses less digits than its factorization.

11002221988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5439 (or 5437 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

Adding to 11002221988 its reverse (88912220011), we get a palindrome (99914441999).

The spelling of 11002221988 in words is "eleven billion, two million, two hundred twenty-one thousand, nine hundred eighty-eight".