212021123321 has 8 divisors (see below), whose sum is σ = 243231187584. Its totient is φ = 181041392160.

The previous prime is 212021123239. The next prime is 212021123323. The reversal of 212021123321 is 123321120212.

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 212021123321 - 2¹⁰ = 212021122297 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212021123293 and 212021123302.

It is not an unprimeable number, because it can be changed into a prime (212021123323) 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, 57581300 + ... + 57584981.

It is an arithmetic number, because the mean of its divisors is an integer number (30403898448).

Almost surely, 2^212021123321 is an apocalyptic number.

It is an amenable number.

212021123321 is a deficient number, since it is larger than the sum of its proper divisors (31210064263).

212021123321 is a wasteful number, since it uses less digits than its factorization.

212021123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115166551.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212021123321 its reverse (123321120212), we get a palindrome (335342243533).

The spelling of 212021123321 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-three thousand, three hundred twenty-one".