240350320421 has 2 divisors, whose sum is σ = 240350320422. Its totient is φ = 240350320420.

The previous prime is 240350320411. The next prime is 240350320423. The reversal of 240350320421 is 124023053042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235918089796 + 4432230625 = 485714^2 + 66575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240350320421 is a prime.

Together with 240350320423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240350320423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120175160210 + 120175160211.

It is an arithmetic number, because the mean of its divisors is an integer number (120175160211).

Almost surely, 2^240350320421 is an apocalyptic number.

It is an amenable number.

240350320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

240350320421 is an equidigital number, since it uses as much as digits as its factorization.

240350320421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 240350320421 its reverse (124023053042), we get a palindrome (364373373463).

The spelling of 240350320421 in words is "two hundred forty billion, three hundred fifty million, three hundred twenty thousand, four hundred twenty-one".