20211200011 has 4 divisors (see below), whose sum is σ = 21274947400. Its totient is φ = 19147452624.

The previous prime is 20211200003. The next prime is 20211200027. The reversal of 20211200011 is 11000211202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20211200011 - 2³ = 20211200003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211200071) 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, 531873666 + ... + 531873703.

It is an arithmetic number, because the mean of its divisors is an integer number (5318736850).

Almost surely, 2^20211200011 is an apocalyptic number.

20211200011 is a deficient number, since it is larger than the sum of its proper divisors (1063747389).

20211200011 is a wasteful number, since it uses less digits than its factorization.

20211200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063747388.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20211200011 its reverse (11000211202), we get a palindrome (31211411213).

The spelling of 20211200011 in words is "twenty billion, two hundred eleven million, two hundred thousand, eleven".