421245004321 has 2 divisors, whose sum is σ = 421245004322. Its totient is φ = 421245004320.

The previous prime is 421245004273. The next prime is 421245004381. The reversal of 421245004321 is 123400542124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409830432400 + 11414571921 = 640180^2 + 106839^2 .

It is a cyclic number.

It is not a de Polignac number, because 421245004321 - 2¹³ = 421244996129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421245004321.

It is not a weakly prime, because it can be changed into another prime (421245004381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210622502160 + 210622502161.

It is an arithmetic number, because the mean of its divisors is an integer number (210622502161).

Almost surely, 2^421245004321 is an apocalyptic number.

It is an amenable number.

421245004321 is a deficient number, since it is larger than the sum of its proper divisors (1).

421245004321 is an equidigital number, since it uses as much as digits as its factorization.

421245004321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 421245004321 its reverse (123400542124), we get a palindrome (544645546445).

The spelling of 421245004321 in words is "four hundred twenty-one billion, two hundred forty-five million, four thousand, three hundred twenty-one".