20212012321 has 2 divisors, whose sum is σ = 20212012322. Its totient is φ = 20212012320.

The previous prime is 20212012267. The next prime is 20212012333. The reversal of 20212012321 is 12321021202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13829760000 + 6382252321 = 117600^2 + 79889^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212012321 - 2¹⁵ = 20211979553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212012295 and 20212012304.

It is not a weakly prime, because it can be changed into another prime (20212012361) 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 as a sum of consecutive naturals, namely, 10106006160 + 10106006161.

It is an arithmetic number, because the mean of its divisors is an integer number (10106006161).

Almost surely, 2^20212012321 is an apocalyptic number.

It is an amenable number.

20212012321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212012321 is an equidigital number, since it uses as much as digits as its factorization.

20212012321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20212012321 its reverse (12321021202), we get a palindrome (32533033523).

The spelling of 20212012321 in words is "twenty billion, two hundred twelve million, twelve thousand, three hundred twenty-one".