21311303230111 has 4 divisors (see below), whose sum is σ = 21454332111000. Its totient is φ = 21168274349224.

The previous prime is 21311303230081. The next prime is 21311303230121. The reversal of 21311303230111 is 11103230311312.

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 21311303230111 - 2¹⁵ = 21311303197343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311303230121) 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 3 ways as a sum of consecutive naturals, for example, 71514440221 + ... + 71514440518.

It is an arithmetic number, because the mean of its divisors is an integer number (5363583027750).

Almost surely, 2^{21311303230111} is an apocalyptic number.

21311303230111 is a deficient number, since it is larger than the sum of its proper divisors (143028880889).

21311303230111 is a wasteful number, since it uses less digits than its factorization.

21311303230111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143028880888.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21311303230111 its reverse (11103230311312), we get a palindrome (32414533541423).

The spelling of 21311303230111 in words is "twenty-one trillion, three hundred eleven billion, three hundred three million, two hundred thirty thousand, one hundred eleven".