421001420339939 has 2 divisors, whose sum is σ = 421001420339940. Its totient is φ = 421001420339938.

The previous prime is 421001420339933. The next prime is 421001420340091. The reversal of 421001420339939 is 939933024100124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421001420339939 - 2²⁴ = 421001403562723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (421001420339933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210500710169969 + 210500710169970.

It is an arithmetic number, because the mean of its divisors is an integer number (210500710169970).

Almost surely, 2^{421001420339939} is an apocalyptic number.

421001420339939 is a deficient number, since it is larger than the sum of its proper divisors (1).

421001420339939 is an equidigital number, since it uses as much as digits as its factorization.

421001420339939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 421001420339939 in words is "four hundred twenty-one trillion, one billion, four hundred twenty million, three hundred thirty-nine thousand, nine hundred thirty-nine".