21011031222203 has 32 divisors (see below), whose sum is σ = 24960478752000. Its totient is φ = 17470940699520.

The previous prime is 21011031222193. The next prime is 21011031222217. The reversal of 21011031222203 is 30222213011012.

It is a de Polignac number, because none of the positive numbers 2^k-21011031222203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011031221203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199166276 + ... + 199271742.

It is an arithmetic number, because the mean of its divisors is an integer number (780014961000).

Almost surely, 2^{21011031222203} is an apocalyptic number.

21011031222203 is a deficient number, since it is larger than the sum of its proper divisors (3949447529797).

21011031222203 is a wasteful number, since it uses less digits than its factorization.

21011031222203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138395.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21011031222203 its reverse (30222213011012), we get a palindrome (51233244233215).

The spelling of 21011031222203 in words is "twenty-one trillion, eleven billion, thirty-one million, two hundred twenty-two thousand, two hundred three".