11001220002 has 12 divisors (see below), whose sum is σ = 23835976710. Its totient is φ = 3667073328.

The previous prime is 11001219989. The next prime is 11001220007. The reversal of 11001220002 is 20002210011.

It can be written as a sum of positive squares in only one way, i.e., 5641662321 + 5359557681 = 75111^2 + 73209^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11001220007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305589427 + ... + 305589462.

Almost surely, 2^11001220002 is an apocalyptic number.

11001220002 is an abundant number, since it is smaller than the sum of its proper divisors (12834756708).

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

11001220002 is a wasteful number, since it uses less digits than its factorization.

11001220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611178897 (or 611178894 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 11001220002 its reverse (20002210011), we get a palindrome (31003430013).

Subtracting 11001220002 from its reverse (20002210011), we obtain a palindrome (9000990009).

The spelling of 11001220002 in words is "eleven billion, one million, two hundred twenty thousand, two".