21343232004421 has 8 divisors (see below), whose sum is σ = 21799572332544. Its totient is φ = 20886984551760.

The previous prime is 21343232004377. The next prime is 21343232004439. The reversal of 21343232004421 is 12440023234312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21343232004421 - 2⁷ = 21343232004293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343232004491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22754245 + ... + 23673658.

It is an arithmetic number, because the mean of its divisors is an integer number (2724946541568).

Almost surely, 2^{21343232004421} is an apocalyptic number.

It is an amenable number.

21343232004421 is a deficient number, since it is larger than the sum of its proper divisors (456340328123).

21343232004421 is an equidigital number, since it uses as much as digits as its factorization.

21343232004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46437731.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21343232004421 its reverse (12440023234312), we get a palindrome (33783255238733).

The spelling of 21343232004421 in words is "twenty-one trillion, three hundred forty-three billion, two hundred thirty-two million, four thousand, four hundred twenty-one".