212021225220305 has 16 divisors (see below), whose sum is σ = 269469466187904. Its totient is φ = 159593411915520.

The previous prime is 212021225220229. The next prime is 212021225220359. The reversal of 212021225220305 is 503022522120212.

It is not a de Polignac number, because 212021225220305 - 2¹² = 212021225216209 is a prime.

It is a Duffinian number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 359851091 + ... + 360439800.

It is an arithmetic number, because the mean of its divisors is an integer number (16841841636744).

Almost surely, 2^{212021225220305} is an apocalyptic number.

It is an amenable number.

212021225220305 is a deficient number, since it is larger than the sum of its proper divisors (57448240967599).

212021225220305 is a wasteful number, since it uses less digits than its factorization.

212021225220305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720294376.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 212021225220305 its reverse (503022522120212), we get a palindrome (715043747340517).

The spelling of 212021225220305 in words is "two hundred twelve trillion, twenty-one billion, two hundred twenty-five million, two hundred twenty thousand, three hundred five".