12122000021221 has 8 divisors (see below), whose sum is σ = 12233399070200. Its totient is φ = 12010604391360.

The previous prime is 12122000021177. The next prime is 12122000021227. The reversal of 12122000021221 is 12212000022121.

It is a happy number.

12122000021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1351696890625 + 10770303130596 = 1162625^2 + 3281814^2 .

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 12122000021221 - 2⁷ = 12122000021093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122000021195 and 12122000021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122000021227) 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, 6562915 + ... + 8204623.

It is an arithmetic number, because the mean of its divisors is an integer number (1529174883775).

Almost surely, 2^{12122000021221} is an apocalyptic number.

It is an amenable number.

12122000021221 is a deficient number, since it is larger than the sum of its proper divisors (111399048979).

12122000021221 is a wasteful number, since it uses less digits than its factorization.

12122000021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709559.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12122000021221 its reverse (12212000022121), we get a palindrome (24334000043342).

The spelling of 12122000021221 in words is "twelve trillion, one hundred twenty-two billion, twenty-one thousand, two hundred twenty-one".