20021320333111 has 4 divisors (see below), whose sum is σ = 20071751870872. Its totient is φ = 19970888795352.

The previous prime is 20021320333103. The next prime is 20021320333199. The reversal of 20021320333111 is 11133302312002.

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 20021320333111 - 2³ = 20021320333103 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 (20021320393111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25215768285 + ... + 25215769078.

It is an arithmetic number, because the mean of its divisors is an integer number (5017937967718).

Almost surely, 2^{20021320333111} is an apocalyptic number.

20021320333111 is a deficient number, since it is larger than the sum of its proper divisors (50431537761).

20021320333111 is an equidigital number, since it uses as much as digits as its factorization.

20021320333111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50431537760.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20021320333111 its reverse (11133302312002), we get a palindrome (31154622645113).

The spelling of 20021320333111 in words is "twenty trillion, twenty-one billion, three hundred twenty million, three hundred thirty-three thousand, one hundred eleven".