21323033332121 has 8 divisors (see below), whose sum is σ = 21373050140064. Its totient is φ = 21273075060160.

The previous prime is 21323033332087. The next prime is 21323033332169. The reversal of 21323033332121 is 12123333032312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323033332121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21323033332421) 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, 13904555 + ... + 15361728.

It is an arithmetic number, because the mean of its divisors is an integer number (2671631267508).

Almost surely, 2^{21323033332121} is an apocalyptic number.

It is an amenable number.

21323033332121 is a deficient number, since it is larger than the sum of its proper divisors (50016807943).

21323033332121 is an equidigital number, since it uses as much as digits as its factorization.

21323033332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29267991.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21323033332121 its reverse (12123333032312), we get a palindrome (33446366364433).

The spelling of 21323033332121 in words is "twenty-one trillion, three hundred twenty-three billion, thirty-three million, three hundred thirty-two thousand, one hundred twenty-one".