21112222103 has 8 divisors (see below), whose sum is σ = 24214121760. Its totient is φ = 18031789440.

The previous prime is 21112222081. The next prime is 21112222121. The reversal of 21112222103 is 30122221112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21112222103 - 2¹² = 21112218007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112225103) 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 7 ways as a sum of consecutive naturals, for example, 5364638 + ... + 5368571.

It is an arithmetic number, because the mean of its divisors is an integer number (3026765220).

Almost surely, 2^21112222103 is an apocalyptic number.

21112222103 is a deficient number, since it is larger than the sum of its proper divisors (3101899657).

21112222103 is a wasteful number, since it uses less digits than its factorization.

21112222103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10733497.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21112222103 its reverse (30122221112), we get a palindrome (51234443215).

Subtracting 21112222103 from its reverse (30122221112), we obtain a palindrome (9009999009).

The spelling of 21112222103 in words is "twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, one hundred three".