21102320303 has 16 divisors (see below), whose sum is σ = 23599991520. Its totient is φ = 18751389696.

The previous prime is 21102320243. The next prime is 21102320359. The reversal of 21102320303 is 30302320112.

It is a cyclic number.

It is not a de Polignac number, because 21102320303 - 2¹⁴ = 21102303919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102320903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16850 + ... + 206127.

It is an arithmetic number, because the mean of its divisors is an integer number (1474999470).

Almost surely, 2^21102320303 is an apocalyptic number.

21102320303 is a deficient number, since it is larger than the sum of its proper divisors (2497671217).

21102320303 is a wasteful number, since it uses less digits than its factorization.

21102320303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223306.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21102320303 its reverse (30302320112), we get a palindrome (51404640415).

The spelling of 21102320303 in words is "twenty-one billion, one hundred two million, three hundred twenty thousand, three hundred three".