21220200112111 has 16 divisors (see below), whose sum is σ = 28491457494528. Its totient is φ = 15263280799200.

The previous prime is 21220200112103. The next prime is 21220200112141. The reversal of 21220200112111 is 11121100202212.

It is not a de Polignac number, because 21220200112111 - 2³ = 21220200112103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220200112141) 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, 10599499555 + ... + 10599501556.

It is an arithmetic number, because the mean of its divisors is an integer number (1780716093408).

Almost surely, 2^{21220200112111} is an apocalyptic number.

21220200112111 is a deficient number, since it is larger than the sum of its proper divisors (7271257382417).

21220200112111 is a wasteful number, since it uses less digits than its factorization.

21220200112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21199001142.

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

Adding to 21220200112111 its reverse (11121100202212), we get a palindrome (32341300314323).

The spelling of 21220200112111 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, one hundred twelve thousand, one hundred eleven".