20211231112 has 16 divisors (see below), whose sum is σ = 38122983360. Its totient is φ = 10045102224.

The previous prime is 20211231109. The next prime is 20211231143. The reversal of 20211231112 is 21113211202.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7562748 + ... + 7565419.

It is an arithmetic number, because the mean of its divisors is an integer number (2382686460).

Almost surely, 2^20211231112 is an apocalyptic number.

It is an amenable number.

20211231112 is a deficient number, since it is larger than the sum of its proper divisors (17911752248).

20211231112 is a wasteful number, since it uses less digits than its factorization.

20211231112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15128340 (or 15128336 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20211231112 its reverse (21113211202), we get a palindrome (41324442314).

The spelling of 20211231112 in words is "twenty billion, two hundred eleven million, two hundred thirty-one thousand, one hundred twelve".