20211223273 has 2 divisors, whose sum is σ = 20211223274. Its totient is φ = 20211223272.

The previous prime is 20211223261. The next prime is 20211223309. The reversal of 20211223273 is 37232211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17554130064 + 2657093209 = 132492^2 + 51547^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211223273 - 2¹⁷ = 20211092201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211223213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105611636 + 10105611637.

It is an arithmetic number, because the mean of its divisors is an integer number (10105611637).

Almost surely, 2^20211223273 is an apocalyptic number.

It is an amenable number.

20211223273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211223273 is an equidigital number, since it uses as much as digits as its factorization.

20211223273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 20211223273 its reverse (37232211202), we get a palindrome (57443434475).

The spelling of 20211223273 in words is "twenty billion, two hundred eleven million, two hundred twenty-three thousand, two hundred seventy-three".