21302221311 has 24 divisors (see below), whose sum is σ = 35285621280. Its totient is φ = 12131142336.

The previous prime is 21302221273. The next prime is 21302221363. The reversal of 21302221311 is 11312220312.

21302221311 is a `hidden beast` number, since 2 + 130 + 2 + 221 + 311 = 666.

It is not a de Polignac number, because 21302221311 - 2⁶ = 21302221247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302221711) 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 23 ways as a sum of consecutive naturals, for example, 558556 + ... + 595473.

It is an arithmetic number, because the mean of its divisors is an integer number (1470234220).

Almost surely, 2^21302221311 is an apocalyptic number.

21302221311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21302221311 is a deficient number, since it is larger than the sum of its proper divisors (13983399969).

21302221311 is a wasteful number, since it uses less digits than its factorization.

21302221311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154335 (or 1154332 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21302221311 its reverse (11312220312), we get a palindrome (32614441623).

Subtracting from 21302221311 its reverse (11312220312), we obtain a palindrome (9990000999).

The spelling of 21302221311 in words is "twenty-one billion, three hundred two million, two hundred twenty-one thousand, three hundred eleven".