2122332221 has 4 divisors (see below), whose sum is σ = 2126976732. Its totient is φ = 2117687712.

The previous prime is 2122332211. The next prime is 2122332229. The reversal of 2122332221 is 1222332212.

It is a happy number.

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 1915375225 + 206956996 = 43765^2 + 14386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122332221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122332193 and 2122332202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122332229) 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, 2321570 + ... + 2322483.

It is an arithmetic number, because the mean of its divisors is an integer number (531744183).

Almost surely, 2^2122332221 is an apocalyptic number.

It is an amenable number.

2122332221 is a deficient number, since it is larger than the sum of its proper divisors (4644511).

2122332221 is an equidigital number, since it uses as much as digits as its factorization.

2122332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644510.

The product of its digits is 576, while the sum is 20.

The square root of 2122332221 is about 46068.7770729808. Note that the first 3 decimals coincide. The cubic root of 2122332221 is about 1285.1025613204.

Adding to 2122332221 its reverse (1222332212), we get a palindrome (3344664433).

Subtracting from 2122332221 its reverse (1222332212), we obtain a palindrome (900000009).

The spelling of 2122332221 in words is "two billion, one hundred twenty-two million, three hundred thirty-two thousand, two hundred twenty-one".