21303332211 has 8 divisors (see below), whose sum is σ = 32462220544. Its totient is φ = 12173332680.

The previous prime is 21303332177. The next prime is 21303332231. The reversal of 21303332211 is 11223330312.

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

It is not a de Polignac number, because 21303332211 - 2¹¹ = 21303330163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1014444391 = 21303332211 / (2 + 1 + 3 + 0 + 3 + 3 + 3 + 2 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303332231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507222175 + ... + 507222216.

It is an arithmetic number, because the mean of its divisors is an integer number (4057777568).

Almost surely, 2^21303332211 is an apocalyptic number.

21303332211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21303332211 is a deficient number, since it is larger than the sum of its proper divisors (11158888333).

21303332211 is a wasteful number, since it uses less digits than its factorization.

21303332211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014444401.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21303332211 its reverse (11223330312), we get a palindrome (32526662523).

The spelling of 21303332211 in words is "twenty-one billion, three hundred three million, three hundred thirty-two thousand, two hundred eleven".