2112130505 has 4 divisors (see below), whose sum is σ = 2534556612. Its totient is φ = 1689704400.

The previous prime is 2112130499. The next prime is 2112130511. The reversal of 2112130505 is 5050312112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2112130499) and next prime (2112130511).

It can be written as a sum of positive squares in 2 ways, for example, as 1379453881 + 732676624 = 37141^2 + 27068^2 .

It is not a de Polignac number, because 2112130505 - 2⁶ = 2112130441 is a prime.

It is a super-2 number, since 2×2112130505² = 8922190540303110050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211213046 + ... + 211213055.

It is an arithmetic number, because the mean of its divisors is an integer number (633639153).

Almost surely, 2^2112130505 is an apocalyptic number.

It is an amenable number.

2112130505 is a deficient number, since it is larger than the sum of its proper divisors (422426107).

2112130505 is an equidigital number, since it uses as much as digits as its factorization.

2112130505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422426106.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2112130505 is about 45957.9210256513. The cubic root of 2112130505 is about 1283.0401581755.

Adding to 2112130505 its reverse (5050312112), we get a palindrome (7162442617).

The spelling of 2112130505 in words is "two billion, one hundred twelve million, one hundred thirty thousand, five hundred five".