21304123311 has 8 divisors (see below), whose sum is σ = 28417230720. Its totient is φ = 14196882392.

The previous prime is 21304123301. The next prime is 21304123417. The reversal of 21304123311 is 11332140312.

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

It is a cyclic number.

It is not a de Polignac number, because 21304123311 - 2⁵ = 21304123279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304123301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458141 + ... + 1472678.

It is an arithmetic number, because the mean of its divisors is an integer number (3552153840).

Almost surely, 2^21304123311 is an apocalyptic number.

21304123311 is a deficient number, since it is larger than the sum of its proper divisors (7113107409).

21304123311 is a wasteful number, since it uses less digits than its factorization.

21304123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933245.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21304123311 its reverse (11332140312), we get a palindrome (32636263623).

The spelling of 21304123311 in words is "twenty-one billion, three hundred four million, one hundred twenty-three thousand, three hundred eleven".