21221232000121 has 8 divisors (see below), whose sum is σ = 22786012157184. Its totient is φ = 19691615442240.

The previous prime is 21221232000119. The next prime is 21221232000161. The reversal of 21221232000121 is 12100023212212.

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 21221232000121 - 2¹ = 21221232000119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221232000161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8790898545 + ... + 8790900958.

It is an arithmetic number, because the mean of its divisors is an integer number (2848251519648).

Almost surely, 2^{21221232000121} is an apocalyptic number.

It is an amenable number.

21221232000121 is a deficient number, since it is larger than the sum of its proper divisors (1564780157063).

21221232000121 is a wasteful number, since it uses less digits than its factorization.

21221232000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17581799591.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21221232000121 its reverse (12100023212212), we get a palindrome (33321255212333).

The spelling of 21221232000121 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred thirty-two million, one hundred twenty-one", and thus it is an aban number.