21110223203 has 2 divisors, whose sum is σ = 21110223204. Its totient is φ = 21110223202.

The previous prime is 21110223181. The next prime is 21110223209. The reversal of 21110223203 is 30232201112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110223203 - 2²² = 21106028899 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110223209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555111601 + 10555111602.

It is an arithmetic number, because the mean of its divisors is an integer number (10555111602).

Almost surely, 2^21110223203 is an apocalyptic number.

21110223203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110223203 is an equidigital number, since it uses as much as digits as its factorization.

21110223203 is an evil number, because the sum of its binary digits is even.

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

Adding to 21110223203 its reverse (30232201112), we get a palindrome (51342424315).

The spelling of 21110223203 in words is "twenty-one billion, one hundred ten million, two hundred twenty-three thousand, two hundred three".