21343331124321 has 8 divisors (see below), whose sum is σ = 28457874244224. Its totient is φ = 14228837710320.

The previous prime is 21343331124317. The next prime is 21343331124343. The reversal of 21343331124321 is 12342113334312.

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

It is not a de Polignac number, because 21343331124321 - 2² = 21343331124317 is a prime.

It is a super-2 number, since 2×21343331124321² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21343331124371) 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, 11412745 + ... + 13150566.

It is an arithmetic number, because the mean of its divisors is an integer number (3557234280528).

Almost surely, 2^{21343331124321} is an apocalyptic number.

It is an amenable number.

21343331124321 is a deficient number, since it is larger than the sum of its proper divisors (7114543119903).

21343331124321 is a wasteful number, since it uses less digits than its factorization.

21343331124321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24852951.

The product of its digits is 31104, while the sum is 33.

Adding to 21343331124321 its reverse (12342113334312), we get a palindrome (33685444458633).

The spelling of 21343331124321 in words is "twenty-one trillion, three hundred forty-three billion, three hundred thirty-one million, one hundred twenty-four thousand, three hundred twenty-one".