21103331104 has 12 divisors (see below), whose sum is σ = 41547183174. Its totient is φ = 10551665536.

The previous prime is 21103331101. The next prime is 21103331111. The reversal of 21103331104 is 40113330112.

It can be written as a sum of positive squares in only one way, i.e., 13468066704 + 7635264400 = 116052^2 + 87380^2 .

It is not an unprimeable number, because it can be changed into a prime (21103331101) by changing a digit.

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 as a sum of consecutive naturals, namely, 329739517 + ... + 329739580.

Almost surely, 2^21103331104 is an apocalyptic number.

It is an amenable number.

21103331104 is a deficient number, since it is larger than the sum of its proper divisors (20443852070).

21103331104 is an equidigital number, since it uses as much as digits as its factorization.

21103331104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659479107 (or 659479099 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21103331104 its reverse (40113330112), we get a palindrome (61216661216).

The spelling of 21103331104 in words is "twenty-one billion, one hundred three million, three hundred thirty-one thousand, one hundred four".