104520205421 has 2 divisors, whose sum is σ = 104520205422. Its totient is φ = 104520205420.

The previous prime is 104520205327. The next prime is 104520205453. The reversal of 104520205421 is 124502025401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103655022025 + 865183396 = 321955^2 + 29414^2 .

It is a cyclic number.

It is not a de Polignac number, because 104520205421 - 2¹⁸ = 104519943277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104520205481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52260102710 + 52260102711.

It is an arithmetic number, because the mean of its divisors is an integer number (52260102711).

Almost surely, 2^104520205421 is an apocalyptic number.

It is an amenable number.

104520205421 is a deficient number, since it is larger than the sum of its proper divisors (1).

104520205421 is an equidigital number, since it uses as much as digits as its factorization.

104520205421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 104520205421 in words is "one hundred four billion, five hundred twenty million, two hundred five thousand, four hundred twenty-one".