21034143321 has 8 divisors (see below), whose sum is σ = 28360643040. Its totient is φ = 13865202912.

The previous prime is 21034143311. The next prime is 21034143329. The reversal of 21034143321 is 12334143012.

It is a happy number.

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

It is not a de Polignac number, because 21034143321 - 2¹⁴ = 21034126937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21034143291 and 21034143300.

It is not an unprimeable number, because it can be changed into a prime (21034143329) 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, 39389515 + ... + 39390048.

It is an arithmetic number, because the mean of its divisors is an integer number (3545080380).

Almost surely, 2^21034143321 is an apocalyptic number.

It is an amenable number.

21034143321 is a deficient number, since it is larger than the sum of its proper divisors (7326499719).

21034143321 is an equidigital number, since it uses as much as digits as its factorization.

21034143321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78779655.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21034143321 its reverse (12334143012), we get a palindrome (33368286333).

The spelling of 21034143321 in words is "twenty-one billion, thirty-four million, one hundred forty-three thousand, three hundred twenty-one".