20121022112 has 24 divisors (see below), whose sum is σ = 41943455316. Its totient is φ = 9468716032.

The previous prime is 20121022111. The next prime is 20121022123. The reversal of 20121022112 is 21122012102.

It can be written as a sum of positive squares in 2 ways, for example, as 19610081296 + 510940816 = 140036^2 + 22604^2 .

It is not an unprimeable number, because it can be changed into a prime (20121022111) 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, 18493043 + ... + 18494130.

Almost surely, 2^20121022112 is an apocalyptic number.

It is an amenable number.

20121022112 is an abundant number, since it is smaller than the sum of its proper divisors (21822433204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121022112 is a wasteful number, since it uses less digits than its factorization.

20121022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36987200 (or 36987192 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20121022112 its reverse (21122012102), we get a palindrome (41243034214).

It can be divided in two parts, 2012102 and 2112, that multiplied together give a palindrome (4249559424).

The spelling of 20121022112 in words is "twenty billion, one hundred twenty-one million, twenty-two thousand, one hundred twelve".