21320112203 has 8 divisors (see below), whose sum is σ = 22961263248. Its totient is φ = 19679124384.

The previous prime is 21320112197. The next prime is 21320112221. The reversal of 21320112203 is 30221102312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21320112203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21320114203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443000 + ... + 488762.

It is an arithmetic number, because the mean of its divisors is an integer number (2870157906).

Almost surely, 2^21320112203 is an apocalyptic number.

21320112203 is a deficient number, since it is larger than the sum of its proper divisors (1641151045).

21320112203 is a wasteful number, since it uses less digits than its factorization.

21320112203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81613.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21320112203 its reverse (30221102312), we get a palindrome (51541214515).

The spelling of 21320112203 in words is "twenty-one billion, three hundred twenty million, one hundred twelve thousand, two hundred three".