2112233132221 has 4 divisors (see below), whose sum is σ = 2185068757500. Its totient is φ = 2039397506944.

The previous prime is 2112233132203. The next prime is 2112233132227. The reversal of 2112233132221 is 1222313322112.

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 688876760196 + 1423356372025 = 829986^2 + 1193045^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112233132221 - 2⁵ = 2112233132189 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 (2112233132227) 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, 36417812596 + ... + 36417812653.

It is an arithmetic number, because the mean of its divisors is an integer number (546267189375).

Almost surely, 2^{2112233132221} is an apocalyptic number.

It is an amenable number.

2112233132221 is a deficient number, since it is larger than the sum of its proper divisors (72835625279).

2112233132221 is an equidigital number, since it uses as much as digits as its factorization.

2112233132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72835625278.

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

Adding to 2112233132221 its reverse (1222313322112), we get a palindrome (3334546454333).

The spelling of 2112233132221 in words is "two trillion, one hundred twelve billion, two hundred thirty-three million, one hundred thirty-two thousand, two hundred twenty-one".