240244321021 has 2 divisors, whose sum is σ = 240244321022. Its totient is φ = 240244321020.

The previous prime is 240244321013. The next prime is 240244321033. The reversal of 240244321021 is 120123442042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138096964996 + 102147356025 = 371614^2 + 319605^2 .

It is a cyclic number.

It is not a de Polignac number, because 240244321021 - 2³ = 240244321013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240244321091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120122160510 + 120122160511.

It is an arithmetic number, because the mean of its divisors is an integer number (120122160511).

Almost surely, 2^240244321021 is an apocalyptic number.

It is an amenable number.

240244321021 is a deficient number, since it is larger than the sum of its proper divisors (1).

240244321021 is an equidigital number, since it uses as much as digits as its factorization.

240244321021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 240244321021 its reverse (120123442042), we get a palindrome (360367763063).

The spelling of 240244321021 in words is "two hundred forty billion, two hundred forty-four million, three hundred twenty-one thousand, twenty-one".