12121200222221 has 8 divisors (see below), whose sum is σ = 12158169331584. Its totient is φ = 12084276728160.

The previous prime is 12121200222191. The next prime is 12121200222281. The reversal of 12121200222221 is 12222200212121.

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 12121200222221 - 2³⁴ = 12104020353037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121200222193 and 12121200222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121200222281) 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, 10871525 + ... + 11934506.

It is an arithmetic number, because the mean of its divisors is an integer number (1519771166448).

Almost surely, 2^{12121200222221} is an apocalyptic number.

It is an amenable number.

12121200222221 is a deficient number, since it is larger than the sum of its proper divisors (36969109363).

12121200222221 is a wasteful number, since it uses less digits than its factorization.

12121200222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22807651.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12121200222221 its reverse (12222200212121), we get a palindrome (24343400434342).

The spelling of 12121200222221 in words is "twelve trillion, one hundred twenty-one billion, two hundred million, two hundred twenty-two thousand, two hundred twenty-one".