20111332321 has 4 divisors (see below), whose sum is σ = 20111616000. Its totient is φ = 20111048644.

The previous prime is 20111332309. The next prime is 20111332327. The reversal of 20111332321 is 12323311102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20111332321 - 2¹⁷ = 20111201249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111332327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66960 + ... + 211438.

It is an arithmetic number, because the mean of its divisors is an integer number (5027904000).

Almost surely, 2^20111332321 is an apocalyptic number.

It is an amenable number.

20111332321 is a deficient number, since it is larger than the sum of its proper divisors (283679).

20111332321 is a wasteful number, since it uses less digits than its factorization.

20111332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283678.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20111332321 its reverse (12323311102), we get a palindrome (32434643423).

The spelling of 20111332321 in words is "twenty billion, one hundred eleven million, three hundred thirty-two thousand, three hundred twenty-one".