2122103221 has 6 divisors (see below), whose sum is σ = 2468569110. Its totient is φ = 1818945576.

The previous prime is 2122103219. The next prime is 2122103237. The reversal of 2122103221 is 1223012212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1869611121 + 252492100 = 43239^2 + 15890^2 .

It is not a de Polignac number, because 2122103221 - 2¹ = 2122103219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2122103195 and 2122103204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122103201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21654066 + ... + 21654163.

It is an arithmetic number, because the mean of its divisors is an integer number (411428185).

Almost surely, 2^2122103221 is an apocalyptic number.

It is an amenable number.

2122103221 is a deficient number, since it is larger than the sum of its proper divisors (346465889).

2122103221 is an equidigital number, since it uses as much as digits as its factorization.

2122103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43308243 (or 43308236 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2122103221 is about 46066.2915915749. The cubic root of 2122103221 is about 1285.0563387311.

Adding to 2122103221 its reverse (1223012212), we get a palindrome (3345115433).

The spelling of 2122103221 in words is "two billion, one hundred twenty-two million, one hundred three thousand, two hundred twenty-one".