212021001321 has 8 divisors (see below), whose sum is σ = 290335065024. Its totient is φ = 137527135920.

The previous prime is 212021001299. The next prime is 212021001347. The reversal of 212021001321 is 123100120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212021001321 - 2¹⁰ = 212021000297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212021001321.

It is not an unprimeable number, because it can be changed into a prime (212021001391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955049445 + ... + 955049666.

It is an arithmetic number, because the mean of its divisors is an integer number (36291883128).

Almost surely, 2^212021001321 is an apocalyptic number.

It is an amenable number.

212021001321 is a deficient number, since it is larger than the sum of its proper divisors (78314063703).

212021001321 is a wasteful number, since it uses less digits than its factorization.

212021001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910099151.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212021001321 its reverse (123100120212), we get a palindrome (335121121533).

The spelling of 212021001321 in words is "two hundred twelve billion, twenty-one million, one thousand, three hundred twenty-one".