2111212321 has 8 divisors (see below), whose sum is σ = 2133495104. Its totient is φ = 2088964080.

The previous prime is 2111212289. The next prime is 2111212339. The reversal of 2111212321 is 1232121112.

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 2111212321 - 2⁵ = 2111212289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111212295 and 2111212304.

It is not an unprimeable number, because it can be changed into a prime (2111212361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125035 + ... + 140911.

It is an arithmetic number, because the mean of its divisors is an integer number (266686888).

Almost surely, 2^2111212321 is an apocalyptic number.

It is an amenable number.

2111212321 is a deficient number, since it is larger than the sum of its proper divisors (22282783).

2111212321 is a wasteful number, since it uses less digits than its factorization.

2111212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17271.

The product of its digits is 48, while the sum is 16.

The square root of 2111212321 is about 45947.9305409939. The cubic root of 2111212321 is about 1282.8542104334.

Adding to 2111212321 its reverse (1232121112), we get a palindrome (3343333433).

It can be divided in two parts, 21112 and 12321, that added together give a palindrome (33433).

The spelling of 2111212321 in words is "two billion, one hundred eleven million, two hundred twelve thousand, three hundred twenty-one".