21122302103 has 32 divisors (see below), whose sum is σ = 26789336064. Its totient is φ = 16226698752.

The previous prime is 21122302099. The next prime is 21122302129. The reversal of 21122302103 is 30120322112.

It is a cyclic number.

It is not a de Polignac number, because 21122302103 - 2² = 21122302099 is a prime.

It is a super-2 number, since 2×21122302103² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122302193) 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 in 31 ways as a sum of consecutive naturals, for example, 604301 + ... + 638297.

It is an arithmetic number, because the mean of its divisors is an integer number (837166752).

Almost surely, 2^21122302103 is an apocalyptic number.

21122302103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21122302103 is a deficient number, since it is larger than the sum of its proper divisors (5667033961).

21122302103 is a wasteful number, since it uses less digits than its factorization.

21122302103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34271.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21122302103 its reverse (30120322112), we get a palindrome (51242624215).

The spelling of 21122302103 in words is "twenty-one billion, one hundred twenty-two million, three hundred two thousand, one hundred three".