21200201211 has 16 divisors (see below), whose sum is σ = 32308930304. Its totient is φ = 12112952544.

The previous prime is 21200201201. The next prime is 21200201221. The reversal of 21200201211 is 11210200212.

It is an interprime number because it is at equal distance from previous prime (21200201201) and next prime (21200201221).

It is not a de Polignac number, because 21200201211 - 2⁹ = 21200200699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21200201201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134085 + ... + 245721.

It is an arithmetic number, because the mean of its divisors is an integer number (2019308144).

Almost surely, 2^21200201211 is an apocalyptic number.

21200201211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21200201211 is a deficient number, since it is larger than the sum of its proper divisors (11108729093).

21200201211 is a wasteful number, since it uses less digits than its factorization.

21200201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120690.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21200201211 its reverse (11210200212), we get a palindrome (32410401423).

Subtracting from 21200201211 its reverse (11210200212), we obtain a palindrome (9990000999).

The spelling of 21200201211 in words is "twenty-one billion, two hundred million, two hundred one thousand, two hundred eleven".