2112321131 has 4 divisors (see below), whose sum is σ = 2113338264. Its totient is φ = 2111304000.

The previous prime is 2112321109. The next prime is 2112321139. The reversal of 2112321131 is 1311232112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112321131 is a prime.

It is a super-2 number, since 2×2112321131² = 8923801120938238322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112321139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505445 + ... + 509606.

It is an arithmetic number, because the mean of its divisors is an integer number (528334566).

Almost surely, 2^2112321131 is an apocalyptic number.

2112321131 is a deficient number, since it is larger than the sum of its proper divisors (1017133).

2112321131 is a wasteful number, since it uses less digits than its factorization.

2112321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017132.

The product of its digits is 72, while the sum is 17.

The square root of 2112321131 is about 45959.9948977369. The cubic root of 2112321131 is about 1283.0787563989.

Adding to 2112321131 its reverse (1311232112), we get a palindrome (3423553243).

The spelling of 2112321131 in words is "two billion, one hundred twelve million, three hundred twenty-one thousand, one hundred thirty-one".