21103333323 has 4 divisors (see below), whose sum is σ = 28137777768. Its totient is φ = 14068888880.

The previous prime is 21103333309. The next prime is 21103333369. The reversal of 21103333323 is 32333330112.

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

It is a cyclic number.

It is not a de Polignac number, because 21103333323 - 2⁶ = 21103333259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21103333293 and 21103333302.

It is not an unprimeable number, because it can be changed into a prime (21103333393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3517222218 + ... + 3517222223.

It is an arithmetic number, because the mean of its divisors is an integer number (7034444442).

Almost surely, 2^21103333323 is an apocalyptic number.

21103333323 is a deficient number, since it is larger than the sum of its proper divisors (7034444445).

21103333323 is an equidigital number, since it uses as much as digits as its factorization.

21103333323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034444444.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 21103333323 its reverse (32333330112), we get a palindrome (53436663435).

The spelling of 21103333323 in words is "twenty-one billion, one hundred three million, three hundred thirty-three thousand, three hundred twenty-three".