11011020201 has 40 divisors (see below), whose sum is σ = 17363112800. Its totient is φ = 6953977656.

The previous prime is 11011020197. The next prime is 11011020289. The reversal of 11011020201 is 10202011011.

It is a happy number.

It is not a de Polignac number, because 11011020201 - 2² = 11011020197 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011020301) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 545670 + ... + 565488.

It is an arithmetic number, because the mean of its divisors is an integer number (434077820).

Almost surely, 2^11011020201 is an apocalyptic number.

It is an amenable number.

11011020201 is a deficient number, since it is larger than the sum of its proper divisors (6352092599).

11011020201 is an frugal number, since it uses more digits than its factorization.

11011020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19888 (or 19841 counting only the distinct ones).

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

Adding to 11011020201 its reverse (10202011011), we get a palindrome (21213031212).

The spelling of 11011020201 in words is "eleven billion, eleven million, twenty thousand, two hundred one".