21200210111 has 8 divisors (see below), whose sum is σ = 22451626944. Its totient is φ = 19949276160.

The previous prime is 21200210041. The next prime is 21200210117. The reversal of 21200210111 is 11101200212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21200210111 - 2²² = 21196015807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200210092 and 21200210101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200210117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28295 + ... + 207848.

It is an arithmetic number, because the mean of its divisors is an integer number (2806453368).

Almost surely, 2^21200210111 is an apocalyptic number.

21200210111 is a deficient number, since it is larger than the sum of its proper divisors (1251416833).

21200210111 is a wasteful number, since it uses less digits than its factorization.

21200210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241441.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21200210111 its reverse (11101200212), we get a palindrome (32301410323).

The spelling of 21200210111 in words is "twenty-one billion, two hundred million, two hundred ten thousand, one hundred eleven".