2440420121 has 2 divisors, whose sum is σ = 2440420122. Its totient is φ = 2440420120.

The previous prime is 2440420109. The next prime is 2440420141. The reversal of 2440420121 is 1210240442.

It is an a-pointer prime, because the next prime (2440420141) can be obtained adding 2440420121 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2313610000 + 126810121 = 48100^2 + 11261^2 .

It is a cyclic number.

It is not a de Polignac number, because 2440420121 - 2¹⁸ = 2440157977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2440420093 and 2440420102.

It is not a weakly prime, because it can be changed into another prime (2440420141) 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, 1220210060 + 1220210061.

It is an arithmetic number, because the mean of its divisors is an integer number (1220210061).

Almost surely, 2^2440420121 is an apocalyptic number.

It is an amenable number.

2440420121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440420121 is an equidigital number, since it uses as much as digits as its factorization.

2440420121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2440420121 is about 49400.6085083980. The cubic root of 2440420121 is about 1346.3403618767.

Adding to 2440420121 its reverse (1210240442), we get a palindrome (3650660563).

The spelling of 2440420121 in words is "two billion, four hundred forty million, four hundred twenty thousand, one hundred twenty-one".