11001021201 has 24 divisors (see below), whose sum is σ = 15991447680. Its totient is φ = 7287425376.

The previous prime is 11001021197. The next prime is 11001021217. The reversal of 11001021201 is 10212010011.

It is a happy number.

It is not a de Polignac number, because 11001021201 - 2² = 11001021197 is a prime.

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 (11001021221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3757000 + ... + 3759926.

It is an arithmetic number, because the mean of its divisors is an integer number (666310320).

Almost surely, 2^11001021201 is an apocalyptic number.

It is an amenable number.

11001021201 is a deficient number, since it is larger than the sum of its proper divisors (4990426479).

11001021201 is a wasteful number, since it uses less digits than its factorization.

11001021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5445 (or 5442 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11001021201 its reverse (10212010011), we get a palindrome (21213031212).

The spelling of 11001021201 in words is "eleven billion, one million, twenty-one thousand, two hundred one".