21103332122 has 4 divisors (see below), whose sum is σ = 31654998186. Its totient is φ = 10551666060.

The previous prime is 21103332083. The next prime is 21103332137. The reversal of 21103332122 is 22123330112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16284056881 + 4819275241 = 127609^2 + 69421^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21103332094 and 21103332103.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5275833029 + ... + 5275833032.

Almost surely, 2^21103332122 is an apocalyptic number.

21103332122 is a deficient number, since it is larger than the sum of its proper divisors (10551666064).

21103332122 is a wasteful number, since it uses less digits than its factorization.

21103332122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551666063.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21103332122 its reverse (22123330112), we get a palindrome (43226662234).

The spelling of 21103332122 in words is "twenty-one billion, one hundred three million, three hundred thirty-two thousand, one hundred twenty-two".