21210221020103 has 2 divisors, whose sum is σ = 21210221020104. Its totient is φ = 21210221020102.

The previous prime is 21210221020067. The next prime is 21210221020111. The reversal of 21210221020103 is 30102012201212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21210221020103 - 2¹⁰ = 21210221019079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210221022103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605110510051 + 10605110510052.

It is an arithmetic number, because the mean of its divisors is an integer number (10605110510052).

Almost surely, 2^{21210221020103} is an apocalyptic number.

21210221020103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210221020103 is an equidigital number, since it uses as much as digits as its factorization.

21210221020103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21210221020103 its reverse (30102012201212), we get a palindrome (51312233221315).

The spelling of 21210221020103 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-one million, twenty thousand, one hundred three".