20212012021321 has 2 divisors, whose sum is σ = 20212012021322. Its totient is φ = 20212012021320.

The previous prime is 20212012021307. The next prime is 20212012021343. The reversal of 20212012021321 is 12312021021202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20164949491600 + 47062529721 = 4490540^2 + 216939^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212012021321 - 2¹¹ = 20212012019273 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212012021121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106006010660 + 10106006010661.

It is an arithmetic number, because the mean of its divisors is an integer number (10106006010661).

Almost surely, 2^{20212012021321} is an apocalyptic number.

It is an amenable number.

20212012021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212012021321 is an equidigital number, since it uses as much as digits as its factorization.

20212012021321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20212012021321 its reverse (12312021021202), we get a palindrome (32524033042523).

The spelling of 20212012021321 in words is "twenty trillion, two hundred twelve billion, twelve million, twenty-one thousand, three hundred twenty-one".