2112347121 has 16 divisors (see below), whose sum is σ = 2987046144. Its totient is φ = 1323212544.

The previous prime is 2112347113. The next prime is 2112347129. The reversal of 2112347121 is 1217432112.

It is an interprime number because it is at equal distance from previous prime (2112347113) and next prime (2112347129).

It is not a de Polignac number, because 2112347121 - 2³ = 2112347113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2112347091 and 2112347100.

It is not an unprimeable number, because it can be changed into a prime (2112347129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2521 + ... + 65046.

It is an arithmetic number, because the mean of its divisors is an integer number (186690384).

Almost surely, 2^2112347121 is an apocalyptic number.

It is an amenable number.

2112347121 is a deficient number, since it is larger than the sum of its proper divisors (874699023).

2112347121 is a wasteful number, since it uses less digits than its factorization.

2112347121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68200.

The product of its digits is 672, while the sum is 24.

The square root of 2112347121 is about 45960.2776427645. The cubic root of 2112347121 is about 1283.0840187112.

Adding to 2112347121 its reverse (1217432112), we get a palindrome (3329779233).

The spelling of 2112347121 in words is "two billion, one hundred twelve million, three hundred forty-seven thousand, one hundred twenty-one".