21200220112103 has 4 divisors (see below), whose sum is σ = 21216565695600. Its totient is φ = 21183874528608.

The previous prime is 21200220112091. The next prime is 21200220112171. The reversal of 21200220112103 is 30121102200212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21200220112103 - 2¹² = 21200220108007 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 (21200220142103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8172789803 + ... + 8172792396.

It is an arithmetic number, because the mean of its divisors is an integer number (5304141423900).

Almost surely, 2^{21200220112103} is an apocalyptic number.

21200220112103 is a deficient number, since it is larger than the sum of its proper divisors (16345583497).

21200220112103 is a wasteful number, since it uses less digits than its factorization.

21200220112103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16345583496.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21200220112103 its reverse (30121102200212), we get a palindrome (51321322312315).

The spelling of 21200220112103 in words is "twenty-one trillion, two hundred billion, two hundred twenty million, one hundred twelve thousand, one hundred three".