2121012112 has 10 divisors (see below), whose sum is σ = 4109460998. Its totient is φ = 1060506048.

The previous prime is 2121012097. The next prime is 2121012139. The reversal of 2121012112 is 2112101212.

It can be written as a sum of positive squares in only one way, i.e., 1153553296 + 967458816 = 33964^2 + 31104^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2121012092 and 2121012101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66281613 + ... + 66281644.

Almost surely, 2^2121012112 is an apocalyptic number.

It is an amenable number.

2121012112 is a deficient number, since it is larger than the sum of its proper divisors (1988448886).

2121012112 is a wasteful number, since it uses less digits than its factorization.

2121012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132563265 (or 132563259 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2121012112 is about 46054.4472553954. The cubic root of 2121012112 is about 1284.8360577538.

Adding to 2121012112 its reverse (2112101212), we get a palindrome (4233113324).

The spelling of 2121012112 in words is "two billion, one hundred twenty-one million, twelve thousand, one hundred twelve".