21221001110203 has 2 divisors, whose sum is σ = 21221001110204. Its totient is φ = 21221001110202.

The previous prime is 21221001110077. The next prime is 21221001110249. The reversal of 21221001110203 is 30201110012212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221001110203 - 2³⁷ = 21083562156731 is a prime.

It is not a weakly prime, because it can be changed into another prime (21221001110293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610500555101 + 10610500555102.

It is an arithmetic number, because the mean of its divisors is an integer number (10610500555102).

Almost surely, 2^{21221001110203} is an apocalyptic number.

21221001110203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221001110203 is an equidigital number, since it uses as much as digits as its factorization.

21221001110203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21221001110203 its reverse (30201110012212), we get a palindrome (51422111122415).

The spelling of 21221001110203 in words is "twenty-one trillion, two hundred twenty-one billion, one million, one hundred ten thousand, two hundred three".