20331012111 has 32 divisors (see below), whose sum is σ = 28914735360. Its totient is φ = 12670442496.

The previous prime is 20331012109. The next prime is 20331012133. The reversal of 20331012111 is 11121013302.

It is a happy number.

It is not a de Polignac number, because 20331012111 - 2¹ = 20331012109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331012811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1913265 + ... + 1923861.

It is an arithmetic number, because the mean of its divisors is an integer number (903585480).

Almost surely, 2^20331012111 is an apocalyptic number.

20331012111 is a deficient number, since it is larger than the sum of its proper divisors (8583723249).

20331012111 is a wasteful number, since it uses less digits than its factorization.

20331012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11063.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20331012111 its reverse (11121013302), we get a palindrome (31452025413).

The spelling of 20331012111 in words is "twenty billion, three hundred thirty-one million, twelve thousand, one hundred eleven".