20331313111 has 4 divisors (see below), whose sum is σ = 20331980824. Its totient is φ = 20330645400.

The previous prime is 20331313103. The next prime is 20331313139. The reversal of 20331313111 is 11131313302.

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 20331313111 - 2³ = 20331313103 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 (20331313511) 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, 285885 + ... + 349846.

It is an arithmetic number, because the mean of its divisors is an integer number (5082995206).

Almost surely, 2^20331313111 is an apocalyptic number.

20331313111 is a deficient number, since it is larger than the sum of its proper divisors (667713).

20331313111 is an equidigital number, since it uses as much as digits as its factorization.

20331313111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667712.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 20331313111 its reverse (11131313302), we get a palindrome (31462626413).

The spelling of 20331313111 in words is "twenty billion, three hundred thirty-one million, three hundred thirteen thousand, one hundred eleven".