2121413321 has 2 divisors, whose sum is σ = 2121413322. Its totient is φ = 2121413320.

The previous prime is 2121413317. The next prime is 2121413339. The reversal of 2121413321 is 1233141212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1502647696 + 618765625 = 38764^2 + 24875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121413321 - 2² = 2121413317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121413293 and 2121413302.

It is not a weakly prime, because it can be changed into another prime (2121413621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060706660 + 1060706661.

It is an arithmetic number, because the mean of its divisors is an integer number (1060706661).

Almost surely, 2^2121413321 is an apocalyptic number.

It is an amenable number.

2121413321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121413321 is an equidigital number, since it uses as much as digits as its factorization.

2121413321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 2121413321 is about 46058.8028611253. The cubic root of 2121413321 is about 1284.9170655090.

Adding to 2121413321 its reverse (1233141212), we get a palindrome (3354554533).

The spelling of 2121413321 in words is "two billion, one hundred twenty-one million, four hundred thirteen thousand, three hundred twenty-one".