2123030221321 has 8 divisors (see below), whose sum is σ = 2128084478280. Its totient is φ = 2117977749888.

The previous prime is 2123030221241. The next prime is 2123030221363. The reversal of 2123030221321 is 1231220303212.

It can be written as a sum of positive squares in 4 ways, for example, as 1681949610000 + 441080611321 = 1296900^2 + 664139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123030221321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123030221292 and 2123030221301.

It is not an unprimeable number, because it can be changed into a prime (2123030221121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1949775 + ... + 2836843.

It is an arithmetic number, because the mean of its divisors is an integer number (266010559785).

Almost surely, 2^{2123030221321} is an apocalyptic number.

It is an amenable number.

2123030221321 is a deficient number, since it is larger than the sum of its proper divisors (5054256959).

2123030221321 is an equidigital number, since it uses as much as digits as its factorization.

2123030221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892763.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2123030221321 its reverse (1231220303212), we get a palindrome (3354250524533).

The spelling of 2123030221321 in words is "two trillion, one hundred twenty-three billion, thirty million, two hundred twenty-one thousand, three hundred twenty-one".