21122222103 has 12 divisors (see below), whose sum is σ = 30515302168. Its totient is φ = 14078977200.

The previous prime is 21122222083. The next prime is 21122222111. The reversal of 21122222103 is 30122222112.

It is not a de Polignac number, because 21122222103 - 2⁵ = 21122222071 is a prime.

It is a super-2 number, since 2×21122222103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122222503) 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 11 ways as a sum of consecutive naturals, for example, 154525 + ... + 257142.

Almost surely, 2^21122222103 is an apocalyptic number.

21122222103 is a deficient number, since it is larger than the sum of its proper divisors (9393080065).

21122222103 is a wasteful number, since it uses less digits than its factorization.

21122222103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417374 (or 417371 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21122222103 its reverse (30122222112), we get a palindrome (51244444215).

Subtracting 21122222103 from its reverse (30122222112), we obtain a palindrome (9000000009).

The spelling of 21122222103 in words is "twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred three".