21101122103 has 2 divisors, whose sum is σ = 21101122104. Its totient is φ = 21101122102.

The previous prime is 21101122079. The next prime is 21101122117. The reversal of 21101122103 is 30122110112.

It is an a-pointer prime, because the next prime (21101122117) can be obtained adding 21101122103 to its sum of digits (14).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101122103 - 2¹⁶ = 21101056567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101124103) 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, 10550561051 + 10550561052.

It is an arithmetic number, because the mean of its divisors is an integer number (10550561052).

Almost surely, 2^21101122103 is an apocalyptic number.

21101122103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101122103 is an equidigital number, since it uses as much as digits as its factorization.

21101122103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21101122103 its reverse (30122110112), we get a palindrome (51223232215).

The spelling of 21101122103 in words is "twenty-one billion, one hundred one million, one hundred twenty-two thousand, one hundred three".