20121013112 has 16 divisors (see below), whose sum is σ = 37754640000. Its totient is φ = 10053109120.

The previous prime is 20121013069. The next prime is 20121013117. The reversal of 20121013112 is 21131012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121013117) 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, 913112 + ... + 934887.

It is an arithmetic number, because the mean of its divisors is an integer number (2359665000).

Almost surely, 2^20121013112 is an apocalyptic number.

It is an amenable number.

20121013112 is a deficient number, since it is larger than the sum of its proper divisors (17633626888).

20121013112 is a wasteful number, since it uses less digits than its factorization.

20121013112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849366 (or 1849362 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20121013112 its reverse (21131012102), we get a palindrome (41252025214).

The spelling of 20121013112 in words is "twenty billion, one hundred twenty-one million, thirteen thousand, one hundred twelve".