2220123121321 has 6 divisors (see below), whose sum is σ = 2582592202410. Its totient is φ = 1902962675376.

The previous prime is 2220123121301. The next prime is 2220123121339. The reversal of 2220123121321 is 1231213210222.

It can be written as a sum of positive squares in only one way, i.e., 2205581414400 + 14541706921 = 1485120^2 + 120589^2 .

It is not a de Polignac number, because 2220123121321 - 2¹³ = 2220123113129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220123121292 and 2220123121301.

It is not an unprimeable number, because it can be changed into a prime (2220123121301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22654317516 + ... + 22654317613.

It is an arithmetic number, because the mean of its divisors is an integer number (430432033735).

Almost surely, 2^{2220123121321} is an apocalyptic number.

It is an amenable number.

2220123121321 is a deficient number, since it is larger than the sum of its proper divisors (362469081089).

2220123121321 is an equidigital number, since it uses as much as digits as its factorization.

2220123121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45308635143 (or 45308635136 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2220123121321 its reverse (1231213210222), we get a palindrome (3451336331543).

The spelling of 2220123121321 in words is "two trillion, two hundred twenty billion, one hundred twenty-three million, one hundred twenty-one thousand, three hundred twenty-one".