2112233231221 has 4 divisors (see below), whose sum is σ = 2118896427852. Its totient is φ = 2105570034592.

The previous prime is 2112233231191. The next prime is 2112233231237. The reversal of 2112233231221 is 1221323322112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 123033279121 + 1989199952100 = 350761^2 + 1410390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112233231221 - 2⁷ = 2112233231093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112233231261) 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, 3331597840 + ... + 3331598473.

It is an arithmetic number, because the mean of its divisors is an integer number (529724106963).

Almost surely, 2^{2112233231221} is an apocalyptic number.

It is an amenable number.

2112233231221 is a deficient number, since it is larger than the sum of its proper divisors (6663196631).

2112233231221 is an equidigital number, since it uses as much as digits as its factorization.

2112233231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663196630.

The product of its digits is 1728, while the sum is 25.

Adding to 2112233231221 its reverse (1221323322112), we get a palindrome (3333556553333).

The spelling of 2112233231221 in words is "two trillion, one hundred twelve billion, two hundred thirty-three million, two hundred thirty-one thousand, two hundred twenty-one".