21220200111 has 32 divisors (see below), whose sum is σ = 31046400000. Its totient is φ = 12785683680.

The previous prime is 21220200109. The next prime is 21220200181. The reversal of 21220200111 is 11100202212.

It is not a de Polignac number, because 21220200111 - 2¹ = 21220200109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220200181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4242390 + ... + 4247388.

It is an arithmetic number, because the mean of its divisors is an integer number (970200000).

Almost surely, 2^21220200111 is an apocalyptic number.

21220200111 is a deficient number, since it is larger than the sum of its proper divisors (9826199889).

21220200111 is a wasteful number, since it uses less digits than its factorization.

21220200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739.

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

Adding to 21220200111 its reverse (11100202212), we get a palindrome (32320402323).

The spelling of 21220200111 in words is "twenty-one billion, two hundred twenty million, two hundred thousand, one hundred eleven".