2121121112 has 16 divisors (see below), whose sum is σ = 4338657000. Its totient is φ = 964145920.

The previous prime is 2121121063. The next prime is 2121121117. The reversal of 2121121112 is 2111211212.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121117) 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, 12051737 + ... + 12051912.

Almost surely, 2^2121121112 is an apocalyptic number.

2121121112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2121121112 is an abundant number, since it is smaller than the sum of its proper divisors (2217535888).

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

2121121112 is a wasteful number, since it uses less digits than its factorization.

2121121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24103666 (or 24103662 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 2121121112 is about 46055.6306221074. The cubic root of 2121121112 is about 1284.8580668582.

Adding to 2121121112 its reverse (2111211212), we get a palindrome (4232332324).

The spelling of 2121121112 in words is "two billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twelve".