210021220273 has 2 divisors, whose sum is σ = 210021220274. Its totient is φ = 210021220272.

The previous prime is 210021220271. The next prime is 210021220313. The reversal of 210021220273 is 372022120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158250409249 + 51770811024 = 397807^2 + 227532^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021220273 - 2¹ = 210021220271 is a prime.

Together with 210021220271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (210021220271) 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 as a sum of consecutive naturals, namely, 105010610136 + 105010610137.

It is an arithmetic number, because the mean of its divisors is an integer number (105010610137).

Almost surely, 2^210021220273 is an apocalyptic number.

It is an amenable number.

210021220273 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021220273 is an equidigital number, since it uses as much as digits as its factorization.

210021220273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 210021220273 its reverse (372022120012), we get a palindrome (582043340285).

The spelling of 210021220273 in words is "two hundred ten billion, twenty-one million, two hundred twenty thousand, two hundred seventy-three".