21122211103 has 16 divisors (see below), whose sum is σ = 25219344960. Its totient is φ = 17307360000.

The previous prime is 21122211059. The next prime is 21122211107. The reversal of 21122211103 is 30111222112.

It is not a de Polignac number, because 21122211103 - 2¹³ = 21122202911 is a prime.

It is a super-4 number, since 4×21122211103⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122211107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494598 + ... + 535603.

It is an arithmetic number, because the mean of its divisors is an integer number (1576209060).

Almost surely, 2^21122211103 is an apocalyptic number.

21122211103 is a deficient number, since it is larger than the sum of its proper divisors (4097133857).

21122211103 is a wasteful number, since it uses less digits than its factorization.

21122211103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030338.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21122211103 its reverse (30111222112), we get a palindrome (51233433215).

The spelling of 21122211103 in words is "twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, one hundred three".