21121444341 has 12 divisors (see below), whose sum is σ = 31835220768. Its totient is φ = 13468746984.

The previous prime is 21121444327. The next prime is 21121444361. The reversal of 21121444341 is 14344412112.

21121444341 is a `hidden beast` number, since 2 + 1 + 1 + 214 + 443 + 4 + 1 = 666.

It is not a de Polignac number, because 21121444341 - 2⁶ = 21121444277 is a prime.

It is a super-2 number, since 2×21121444341² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121444321) 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 11 ways as a sum of consecutive naturals, for example, 51017775 + ... + 51018188.

It is an arithmetic number, because the mean of its divisors is an integer number (2652935064).

Almost surely, 2^21121444341 is an apocalyptic number.

It is an amenable number.

21121444341 is a deficient number, since it is larger than the sum of its proper divisors (10713776427).

21121444341 is a wasteful number, since it uses less digits than its factorization.

21121444341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102035992 (or 102035989 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 21121444341 its reverse (14344412112), we get a palindrome (35465856453).

The spelling of 21121444341 in words is "twenty-one billion, one hundred twenty-one million, four hundred forty-four thousand, three hundred forty-one".