21102202223203 has 4 divisors (see below), whose sum is σ = 21102249954888. Its totient is φ = 21102154491520.

The previous prime is 21102202223197. The next prime is 21102202223231. The reversal of 21102202223203 is 30232220220112.

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 21102202223203 - 2⁵ = 21102202223171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102202223233) 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, 23196433 + ... + 24088978.

It is an arithmetic number, because the mean of its divisors is an integer number (5275562488722).

Almost surely, 2^{21102202223203} is an apocalyptic number.

21102202223203 is a deficient number, since it is larger than the sum of its proper divisors (47731685).

21102202223203 is an equidigital number, since it uses as much as digits as its factorization.

21102202223203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47731684.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21102202223203 its reverse (30232220220112), we get a palindrome (51334422443315).

The spelling of 21102202223203 in words is "twenty-one trillion, one hundred two billion, two hundred two million, two hundred twenty-three thousand, two hundred three".