21233122332121 has 32 divisors (see below), whose sum is σ = 24485564252160. Its totient is φ = 18035808126336.

The previous prime is 21233122332083. The next prime is 21233122332167. The reversal of 21233122332121 is 12123322133212.

It is a de Polignac number, because none of the positive numbers 2^k-21233122332121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21233122332121.

It is not an unprimeable number, because it can be changed into a prime (21233122332421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5233698325 + ... + 5233702381.

It is an arithmetic number, because the mean of its divisors is an integer number (765173882880).

Almost surely, 2^{21233122332121} is an apocalyptic number.

It is an amenable number.

21233122332121 is a deficient number, since it is larger than the sum of its proper divisors (3252441920039).

21233122332121 is a wasteful number, since it uses less digits than its factorization.

21233122332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9493.

The product of its digits is 5184, while the sum is 28.

Adding to 21233122332121 its reverse (12123322133212), we get a palindrome (33356444465333).

The spelling of 21233122332121 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred twenty-two million, three hundred thirty-two thousand, one hundred twenty-one".