21213221100103 has 2 divisors, whose sum is σ = 21213221100104. Its totient is φ = 21213221100102.

The previous prime is 21213221100031. The next prime is 21213221100161. The reversal of 21213221100103 is 30100112231212.

Together with previous prime (21213221100031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21213221100103 - 2⁹ = 21213221099591 is a prime.

It is a super-2 number, since 2×21213221100103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213221100163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606610550051 + 10606610550052.

It is an arithmetic number, because the mean of its divisors is an integer number (10606610550052).

Almost surely, 2^{21213221100103} is an apocalyptic number.

21213221100103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213221100103 is an equidigital number, since it uses as much as digits as its factorization.

21213221100103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21213221100103 its reverse (30100112231212), we get a palindrome (51313333331315).

The spelling of 21213221100103 in words is "twenty-one trillion, two hundred thirteen billion, two hundred twenty-one million, one hundred thousand, one hundred three".