212241314343221 has 4 divisors (see below), whose sum is σ = 212242057320972. Its totient is φ = 212240571365472.

The previous prime is 212241314343151. The next prime is 212241314343239. The reversal of 212241314343221 is 122343413142212.

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 64357473780721 + 147883840562500 = 8022311^2 + 12160750^2 .

It is a cyclic number.

It is not a de Polignac number, because 212241314343221 - 2³⁸ = 211966436436277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212241314343251) 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, 371060216 + ... + 371631761.

It is an arithmetic number, because the mean of its divisors is an integer number (53060514330243).

Almost surely, 2^{212241314343221} is an apocalyptic number.

It is an amenable number.

212241314343221 is a deficient number, since it is larger than the sum of its proper divisors (742977751).

212241314343221 is an equidigital number, since it uses as much as digits as its factorization.

212241314343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742977750.

The product of its digits is 55296, while the sum is 35.

Adding to 212241314343221 its reverse (122343413142212), we get a palindrome (334584727485433).

The spelling of 212241314343221 in words is "two hundred twelve trillion, two hundred forty-one billion, three hundred fourteen million, three hundred forty-three thousand, two hundred twenty-one".