3122121112221 has 8 divisors (see below), whose sum is σ = 4164983946144. Its totient is φ = 2080336176560.

The previous prime is 3122121112199. The next prime is 3122121112223. The reversal of 3122121112221 is 1222111212213.

3122121112221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3122121112221 - 2¹⁵ = 3122121079453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3122121112223) 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, 269467806 + ... + 269479391.

It is an arithmetic number, because the mean of its divisors is an integer number (520622993268).

Almost surely, 2^{3122121112221} is an apocalyptic number.

It is an amenable number.

3122121112221 is a deficient number, since it is larger than the sum of its proper divisors (1042862833923).

3122121112221 is a wasteful number, since it uses less digits than its factorization.

3122121112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538949131.

The product of its digits is 192, while the sum is 21.

Adding to 3122121112221 its reverse (1222111212213), we get a palindrome (4344232324434).

The spelling of 3122121112221 in words is "three trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".