210220112621 has 2 divisors, whose sum is σ = 210220112622. Its totient is φ = 210220112620.

The previous prime is 210220112491. The next prime is 210220112633. The reversal of 210220112621 is 126211022012.

210220112621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200758659721 + 9461452900 = 448061^2 + 97270^2 .

It is a cyclic number.

It is not a de Polignac number, because 210220112621 - 2²⁶ = 210153003757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210220112593 and 210220112602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220112671) 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, 105110056310 + 105110056311.

It is an arithmetic number, because the mean of its divisors is an integer number (105110056311).

Almost surely, 2^210220112621 is an apocalyptic number.

It is an amenable number.

210220112621 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220112621 is an equidigital number, since it uses as much as digits as its factorization.

210220112621 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 20.

Adding to 210220112621 its reverse (126211022012), we get a palindrome (336431134633).

The spelling of 210220112621 in words is "two hundred ten billion, two hundred twenty million, one hundred twelve thousand, six hundred twenty-one".