21022123103 has 2 divisors, whose sum is σ = 21022123104. Its totient is φ = 21022123102.

The previous prime is 21022123099. The next prime is 21022123139. The reversal of 21022123103 is 30132122012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21022123103 - 2² = 21022123099 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022123193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511061551 + 10511061552.

It is an arithmetic number, because the mean of its divisors is an integer number (10511061552).

Almost surely, 2^21022123103 is an apocalyptic number.

21022123103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022123103 is an equidigital number, since it uses as much as digits as its factorization.

21022123103 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 17.

Adding to 21022123103 its reverse (30132122012), we get a palindrome (51154245115).

The spelling of 21022123103 in words is "twenty-one billion, twenty-two million, one hundred twenty-three thousand, one hundred three".