212021163425 has 6 divisors (see below), whose sum is σ = 262906242678. Its totient is φ = 169616930720.

The previous prime is 212021163359. The next prime is 212021163463. The reversal of 212021163425 is 524361120212.

212021163425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 13811890576 + 198209272849 = 117524^2 + 445207^2 .

It is not a de Polignac number, because 212021163425 - 2⁸ = 212021163169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 4240423244 + ... + 4240423293.

It is an arithmetic number, because the mean of its divisors is an integer number (43817707113).

Almost surely, 2^212021163425 is an apocalyptic number.

212021163425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212021163425 is a deficient number, since it is larger than the sum of its proper divisors (50885079253).

212021163425 is an equidigital number, since it uses as much as digits as its factorization.

212021163425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8480846547 (or 8480846542 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 212021163425 its reverse (524361120212), we get a palindrome (736382283637).

The spelling of 212021163425 in words is "two hundred twelve billion, twenty-one million, one hundred sixty-three thousand, four hundred twenty-five".