4240221234121 has 2 divisors, whose sum is σ = 4240221234122. Its totient is φ = 4240221234120.

The previous prime is 4240221234091. The next prime is 4240221234209. The reversal of 4240221234121 is 1214321220424.

4240221234121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3077091338896 + 1163129895225 = 1754164^2 + 1078485^2 .

It is a cyclic number.

It is not a de Polignac number, because 4240221234121 - 2¹¹ = 4240221232073 is a prime.

It is a super-2 number, since 2×4240221234121² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4240221234121.

It is not a weakly prime, because it can be changed into another prime (4240221244121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2120110617060 + 2120110617061.

It is an arithmetic number, because the mean of its divisors is an integer number (2120110617061).

Almost surely, 2^{4240221234121} is an apocalyptic number.

It is an amenable number.

4240221234121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4240221234121 is an equidigital number, since it uses as much as digits as its factorization.

4240221234121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 4240221234121 its reverse (1214321220424), we get a palindrome (5454542454545).

The spelling of 4240221234121 in words is "four trillion, two hundred forty billion, two hundred twenty-one million, two hundred thirty-four thousand, one hundred twenty-one".