421221968955 has 32 divisors (see below), whose sum is σ = 749762603520. Its totient is φ = 224374652640.

The previous prime is 421221968933. The next prime is 421221968957. The reversal of 421221968955 is 559869122124.

421221968955 is a `hidden beast` number, since 421 + 2 + 2 + 1 + 96 + 89 + 55 = 666.

It is not a de Polignac number, because 421221968955 - 2⁹ = 421221968443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421221968957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1814167 + ... + 2033136.

It is an arithmetic number, because the mean of its divisors is an integer number (23430081360).

Almost surely, 2^421221968955 is an apocalyptic number.

421221968955 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421221968955 is a deficient number, since it is larger than the sum of its proper divisors (328540634565).

421221968955 is a wasteful number, since it uses less digits than its factorization.

421221968955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848128 (or 3848122 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 421221968955 in words is "four hundred twenty-one billion, two hundred twenty-one million, nine hundred sixty-eight thousand, nine hundred fifty-five".