2112221131 has 4 divisors (see below), whose sum is σ = 2112318000. Its totient is φ = 2112124264.

The previous prime is 2112221129. The next prime is 2112221147. The reversal of 2112221131 is 1311222112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2112221131 - 2¹ = 2112221129 is a prime.

It is a super-2 number, since 2×2112221131² = 8922956212485838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112221171) 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 3 ways as a sum of consecutive naturals, for example, 1290 + ... + 65008.

It is an arithmetic number, because the mean of its divisors is an integer number (528079500).

Almost surely, 2^2112221131 is an apocalyptic number.

2112221131 is a deficient number, since it is larger than the sum of its proper divisors (96869).

2112221131 is an equidigital number, since it uses as much as digits as its factorization.

2112221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96868.

The product of its digits is 48, while the sum is 16.

The square root of 2112221131 is about 45958.9069822162. The cubic root of 2112221131 is about 1283.0585085464.

Adding to 2112221131 its reverse (1311222112), we get a palindrome (3423443243).

The spelling of 2112221131 in words is "two billion, one hundred twelve million, two hundred twenty-one thousand, one hundred thirty-one".