21200112111 has 8 divisors (see below), whose sum is σ = 29030784304. Its totient is φ = 13751424000.

The previous prime is 21200112107. The next prime is 21200112133. The reversal of 21200112111 is 11121100212.

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

It is not a de Polignac number, because 21200112111 - 2² = 21200112107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200112211) 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 7 ways as a sum of consecutive naturals, for example, 95495890 + ... + 95496111.

It is an arithmetic number, because the mean of its divisors is an integer number (3628848038).

Almost surely, 2^21200112111 is an apocalyptic number.

21200112111 is a deficient number, since it is larger than the sum of its proper divisors (7830672193).

21200112111 is a wasteful number, since it uses less digits than its factorization.

21200112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190992041.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21200112111 its reverse (11121100212), we get a palindrome (32321212323).

The spelling of 21200112111 in words is "twenty-one billion, two hundred million, one hundred twelve thousand, one hundred eleven".