221341331421 has 36 divisors (see below), whose sum is σ = 391488084000. Its totient is φ = 119823874128.

The previous prime is 221341331417. The next prime is 221341331441. The reversal of 221341331421 is 124133143122.

221341331421 is a `hidden beast` number, since 2 + 2 + 1 + 341 + 3 + 314 + 2 + 1 = 666.

It is not a de Polignac number, because 221341331421 - 2² = 221341331417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221341331441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13199721 + ... + 13216478.

It is an arithmetic number, because the mean of its divisors is an integer number (10874669000).

Almost surely, 2^221341331421 is an apocalyptic number.

221341331421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221341331421 is a deficient number, since it is larger than the sum of its proper divisors (170146752579).

221341331421 is a wasteful number, since it uses less digits than its factorization.

221341331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26416238 (or 26416228 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 221341331421 its reverse (124133143122), we get a palindrome (345474474543).

The spelling of 221341331421 in words is "two hundred twenty-one billion, three hundred forty-one million, three hundred thirty-one thousand, four hundred twenty-one".