2121120112 has 20 divisors (see below), whose sum is σ = 4159186920. Its totient is φ = 1047781568.

The previous prime is 2121120061. The next prime is 2121120137. The reversal of 2121120112 is 2110211212.

It is a junction number, because it is equal to n+sod(n) for n = 2121120092 and 2121120101.

It is a congruent number.

It is an unprimeable number.

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, 797287 + ... + 799942.

It is an arithmetic number, because the mean of its divisors is an integer number (207959346).

Almost surely, 2^2121120112 is an apocalyptic number.

It is an amenable number.

2121120112 is a deficient number, since it is larger than the sum of its proper divisors (2038066808).

2121120112 is a wasteful number, since it uses less digits than its factorization.

2121120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597320 (or 1597314 counting only the distinct ones).

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

The square root of 2121120112 is about 46055.6197656703. The cubic root of 2121120112 is about 1284.8578649432.

Adding to 2121120112 its reverse (2110211212), we get a palindrome (4231331324).

The spelling of 2121120112 in words is "two billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twelve".