213311202220321 has 4 divisors (see below), whose sum is σ = 213311758598532. Its totient is φ = 213310645842112.

The previous prime is 213311202220309. The next prime is 213311202220327. The reversal of 213311202220321 is 123022202113312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99492944398225 + 113818257822096 = 9974615^2 + 10668564^2 .

It is a cyclic number.

It is not a de Polignac number, because 213311202220321 - 2⁵ = 213311202220289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213311202220327) 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 in 3 ways as a sum of consecutive naturals, for example, 277613620 + ... + 278380933.

It is an arithmetic number, because the mean of its divisors is an integer number (53327939649633).

Almost surely, 2^{213311202220321} is an apocalyptic number.

It is an amenable number.

213311202220321 is a deficient number, since it is larger than the sum of its proper divisors (556378211).

213311202220321 is an equidigital number, since it uses as much as digits as its factorization.

213311202220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556378210.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 213311202220321 its reverse (123022202113312), we get a palindrome (336333404333633).

The spelling of 213311202220321 in words is "two hundred thirteen trillion, three hundred eleven billion, two hundred two million, two hundred twenty thousand, three hundred twenty-one".