213241313213221 has 4 divisors (see below), whose sum is σ = 216244711990944. Its totient is φ = 210237914435500.

The previous prime is 213241313213207. The next prime is 213241313213263. The reversal of 213241313213221 is 122312313142312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213241313213221 - 2⁵ = 213241313213189 is a prime.

It is a super-3 number, since 3×213241313213221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213241313213021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1501699388755 + ... + 1501699388896.

It is an arithmetic number, because the mean of its divisors is an integer number (54061177997736).

Almost surely, 2^{213241313213221} is an apocalyptic number.

It is an amenable number.

213241313213221 is a deficient number, since it is larger than the sum of its proper divisors (3003398777723).

213241313213221 is an equidigital number, since it uses as much as digits as its factorization.

213241313213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003398777722.

The product of its digits is 10368, while the sum is 31.

Adding to 213241313213221 its reverse (122312313142312), we get a palindrome (335553626355533).

The spelling of 213241313213221 in words is "two hundred thirteen trillion, two hundred forty-one billion, three hundred thirteen million, two hundred thirteen thousand, two hundred twenty-one".