2112131145 has 16 divisors (see below), whose sum is σ = 3380063040. Its totient is φ = 1126252224.

The previous prime is 2112131141. The next prime is 2112131149. The reversal of 2112131145 is 5411312112.

It is an interprime number because it is at equal distance from previous prime (2112131141) and next prime (2112131149).

It is not a de Polignac number, because 2112131145 - 2² = 2112131141 is a prime.

It is a super-2 number, since 2×2112131145² = 8922195947358022050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2112131141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94071 + ... + 114339.

It is an arithmetic number, because the mean of its divisors is an integer number (211253940).

Almost surely, 2^2112131145 is an apocalyptic number.

It is an amenable number.

2112131145 is a deficient number, since it is larger than the sum of its proper divisors (1267931895).

2112131145 is a wasteful number, since it uses less digits than its factorization.

2112131145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27224.

The product of its digits is 240, while the sum is 21.

The square root of 2112131145 is about 45957.9279885419. The cubic root of 2112131145 is about 1283.0402877675.

Adding to 2112131145 its reverse (5411312112), we get a palindrome (7523443257).

The spelling of 2112131145 in words is "two billion, one hundred twelve million, one hundred thirty-one thousand, one hundred forty-five".