2231212120321 has 8 divisors (see below), whose sum is σ = 2348662272320. Its totient is φ = 2113763761872.

The previous prime is 2231212120303. The next prime is 2231212120349. The reversal of 2231212120321 is 1230212121322.

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 2231212120321 - 2⁹ = 2231212119809 is a prime.

It is a super-3 number, since 3×2231212120321³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231212120292 and 2231212120301.

It is not an unprimeable number, because it can be changed into a prime (2231212120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2656471 + ... + 3394003.

It is an arithmetic number, because the mean of its divisors is an integer number (293582784040).

Almost surely, 2^{2231212120321} is an apocalyptic number.

It is an amenable number.

2231212120321 is a deficient number, since it is larger than the sum of its proper divisors (117450151999).

2231212120321 is a wasteful number, since it uses less digits than its factorization.

2231212120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896775.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2231212120321 its reverse (1230212121322), we get a palindrome (3461424241643).

The spelling of 2231212120321 in words is "two trillion, two hundred thirty-one billion, two hundred twelve million, one hundred twenty thousand, three hundred twenty-one".