21200201221111 has 16 divisors (see below), whose sum is σ = 24345214473600. Its totient is φ = 18258182157600.

The previous prime is 21200201221109. The next prime is 21200201221123. The reversal of 21200201221111 is 11112210200212.

It is not a de Polignac number, because 21200201221111 - 2¹ = 21200201221109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200201221811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9760201 + ... + 11732941.

It is an arithmetic number, because the mean of its divisors is an integer number (1521575904600).

Almost surely, 2^{21200201221111} is an apocalyptic number.

21200201221111 is a deficient number, since it is larger than the sum of its proper divisors (3145013252489).

21200201221111 is a wasteful number, since it uses less digits than its factorization.

21200201221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024190.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21200201221111 its reverse (11112210200212), we get a palindrome (32312411421323).

The spelling of 21200201221111 in words is "twenty-one trillion, two hundred billion, two hundred one million, two hundred twenty-one thousand, one hundred eleven".