21223113103 has 2 divisors, whose sum is σ = 21223113104. Its totient is φ = 21223113102.

The previous prime is 21223113101. The next prime is 21223113139. The reversal of 21223113103 is 30131132212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21223113103 - 2¹ = 21223113101 is a prime.

Together with 21223113101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223113101) 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, 10611556551 + 10611556552.

It is an arithmetic number, because the mean of its divisors is an integer number (10611556552).

Almost surely, 2^21223113103 is an apocalyptic number.

21223113103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223113103 is an equidigital number, since it uses as much as digits as its factorization.

21223113103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21223113103 its reverse (30131132212), we get a palindrome (51354245315).

It can be divided in two parts, 2122 and 3113103, that added together give a square (3115225 = 1765²).

The spelling of 21223113103 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirteen thousand, one hundred three".