2121112012 has 6 divisors (see below), whose sum is σ = 3711946028. Its totient is φ = 1060556004.

The previous prime is 2121111989. The next prime is 2121112013. The reversal of 2121112012 is 2102111212.

It is a junction number, because it is equal to n+sod(n) for n = 2121111983 and 2121112001.

It is not an unprimeable number, because it can be changed into a prime (2121112013) 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 as a sum of consecutive naturals, namely, 265138998 + ... + 265139005.

Almost surely, 2^2121112012 is an apocalyptic number.

It is an amenable number.

2121112012 is a deficient number, since it is larger than the sum of its proper divisors (1590834016).

2121112012 is a wasteful number, since it uses less digits than its factorization.

2121112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530278007 (or 530278005 counting only the distinct ones).

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

The square root of 2121112012 is about 46055.5318284351. The cubic root of 2121112012 is about 1284.8562294297.

Adding to 2121112012 its reverse (2102111212), we get a palindrome (4223223224).

The spelling of 2121112012 in words is "two billion, one hundred twenty-one million, one hundred twelve thousand, twelve".