2112140442221 has 8 divisors (see below), whose sum is σ = 2152026975384. Its totient is φ = 2072255199040.

The previous prime is 2112140442163. The next prime is 2112140442233. The reversal of 2112140442221 is 1222440412112.

It can be written as a sum of positive squares in 4 ways, for example, as 180357349225 + 1931783092996 = 424685^2 + 1389886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112140442221 is a prime.

It is a super-2 number, since 2×2112140442221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112140442281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3380855 + ... + 3956571.

It is an arithmetic number, because the mean of its divisors is an integer number (269003371923).

Almost surely, 2^{2112140442221} is an apocalyptic number.

It is an amenable number.

2112140442221 is a deficient number, since it is larger than the sum of its proper divisors (39886533163).

2112140442221 is an equidigital number, since it uses as much as digits as its factorization.

2112140442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644991.

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 2112140442221 its reverse (1222440412112), we get a palindrome (3334580854333).

The spelling of 2112140442221 in words is "two trillion, one hundred twelve billion, one hundred forty million, four hundred forty-two thousand, two hundred twenty-one".