21343234241 has 12 divisors (see below), whose sum is σ = 24878852928. Its totient is φ = 18256615272.

The previous prime is 21343234217. The next prime is 21343234303. The reversal of 21343234241 is 14243234312.

It is not a de Polignac number, because 21343234241 - 2⁶ = 21343234177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21343234141) 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 11 ways as a sum of consecutive naturals, for example, 423341 + ... + 471066.

It is an arithmetic number, because the mean of its divisors is an integer number (2073237744).

Almost surely, 2^21343234241 is an apocalyptic number.

It is an amenable number.

21343234241 is a deficient number, since it is larger than the sum of its proper divisors (3535618687).

21343234241 is an equidigital number, since it uses as much as digits as its factorization.

21343234241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894908 (or 894901 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

Adding to 21343234241 its reverse (14243234312), we get a palindrome (35586468553).

The spelling of 21343234241 in words is "twenty-one billion, three hundred forty-three million, two hundred thirty-four thousand, two hundred forty-one".