21103110323 has 8 divisors (see below), whose sum is σ = 22265349120. Its totient is φ = 19946026440.

The previous prime is 21103110317. The next prime is 21103110373. The reversal of 21103110323 is 32301130112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103110323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103110373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280315 + ... + 1296692.

It is an arithmetic number, because the mean of its divisors is an integer number (2783168640).

Almost surely, 2^21103110323 is an apocalyptic number.

21103110323 is a deficient number, since it is larger than the sum of its proper divisors (1162238797).

21103110323 is a wasteful number, since it uses less digits than its factorization.

21103110323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577457.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21103110323 its reverse (32301130112), we get a palindrome (53404240435).

The spelling of 21103110323 in words is "twenty-one billion, one hundred three million, one hundred ten thousand, three hundred twenty-three".