421205383501099 has 2 divisors, whose sum is σ = 421205383501100. Its totient is φ = 421205383501098.

The previous prime is 421205383501093. The next prime is 421205383501127. The reversal of 421205383501099 is 990105383502124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421205383501099 is a prime.

It is not a weakly prime, because it can be changed into another prime (421205383501093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210602691750549 + 210602691750550.

It is an arithmetic number, because the mean of its divisors is an integer number (210602691750550).

Almost surely, 2^{421205383501099} is an apocalyptic number.

421205383501099 is a deficient number, since it is larger than the sum of its proper divisors (1).

421205383501099 is an equidigital number, since it uses as much as digits as its factorization.

421205383501099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 421205383501099 in words is "four hundred twenty-one trillion, two hundred five billion, three hundred eighty-three million, five hundred one thousand, ninety-nine".