21302230311 has 16 divisors (see below), whose sum is σ = 31562749920. Its totient is φ = 14199736320.

The previous prime is 21302230259. The next prime is 21302230337. The reversal of 21302230311 is 11303220312.

21302230311 is a `hidden beast` number, since 2 + 130 + 223 + 0 + 311 = 666.

It is not a de Polignac number, because 21302230311 - 2¹³ = 21302222119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302230211) 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, 197031 + ... + 285351.

It is an arithmetic number, because the mean of its divisors is an integer number (1972671870).

Almost surely, 2^21302230311 is an apocalyptic number.

21302230311 is a deficient number, since it is larger than the sum of its proper divisors (10260519609).

21302230311 is an equidigital number, since it uses as much as digits as its factorization.

21302230311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97263 (or 97257 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21302230311 its reverse (11303220312), we get a palindrome (32605450623).

Subtracting from 21302230311 its reverse (11303220312), we obtain a palindrome (9999009999).

The spelling of 21302230311 in words is "twenty-one billion, three hundred two million, two hundred thirty thousand, three hundred eleven".