421021323304487 has 2 divisors, whose sum is σ = 421021323304488. Its totient is φ = 421021323304486.

The previous prime is 421021323304403. The next prime is 421021323304507. The reversal of 421021323304487 is 784403323120124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421021323304487 - 2¹⁶ = 421021323238951 is a prime.

It is a super-2 number, since 2×421021323304487² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421021323304787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210510661652243 + 210510661652244.

It is an arithmetic number, because the mean of its divisors is an integer number (210510661652244).

Almost surely, 2^{421021323304487} is an apocalyptic number.

421021323304487 is a deficient number, since it is larger than the sum of its proper divisors (1).

421021323304487 is an equidigital number, since it uses as much as digits as its factorization.

421021323304487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 44.

The spelling of 421021323304487 in words is "four hundred twenty-one trillion, twenty-one billion, three hundred twenty-three million, three hundred four thousand, four hundred eighty-seven".