21103013122 has 8 divisors (see below), whose sum is σ = 32510047356. Its totient is φ = 10266330672.

The previous prime is 21103013111. The next prime is 21103013143. The reversal of 21103013122 is 22131030112.

It can be written as a sum of positive squares in 2 ways, for example, as 17116227241 + 3986785881 = 130829^2 + 63141^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21103013096 and 21103013105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142587853 + ... + 142588000.

Almost surely, 2^21103013122 is an apocalyptic number.

21103013122 is a deficient number, since it is larger than the sum of its proper divisors (11407034234).

21103013122 is a wasteful number, since it uses less digits than its factorization.

21103013122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285175892.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21103013122 its reverse (22131030112), we get a palindrome (43234043234).

The spelling of 21103013122 in words is "twenty-one billion, one hundred three million, thirteen thousand, one hundred twenty-two".