421204094855 has 4 divisors (see below), whose sum is σ = 505444913832. Its totient is φ = 336963275880.

The previous prime is 421204094833. The next prime is 421204094921. The reversal of 421204094855 is 558490402124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 421204094855 - 2⁶ = 421204094791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 42120409481 + ... + 42120409490.

It is an arithmetic number, because the mean of its divisors is an integer number (126361228458).

Almost surely, 2^421204094855 is an apocalyptic number.

421204094855 is a deficient number, since it is larger than the sum of its proper divisors (84240818977).

421204094855 is an equidigital number, since it uses as much as digits as its factorization.

421204094855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84240818976.

The product of its (nonzero) digits is 460800, while the sum is 44.

Adding to 421204094855 its reverse (558490402124), we get a palindrome (979694496979).

The spelling of 421204094855 in words is "four hundred twenty-one billion, two hundred four million, ninety-four thousand, eight hundred fifty-five".