212205342331 has 2 divisors, whose sum is σ = 212205342332. Its totient is φ = 212205342330.

The previous prime is 212205342329. The next prime is 212205342341. The reversal of 212205342331 is 133243502212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212205342331 - 2¹ = 212205342329 is a prime.

It is a super-2 number, since 2×212205342331² (a number of 23 digits) contains 22 as substring.

Together with 212205342329, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212205342331.

It is not a weakly prime, because it can be changed into another prime (212205342341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106102671165 + 106102671166.

It is an arithmetic number, because the mean of its divisors is an integer number (106102671166).

Almost surely, 2^212205342331 is an apocalyptic number.

212205342331 is a deficient number, since it is larger than the sum of its proper divisors (1).

212205342331 is an equidigital number, since it uses as much as digits as its factorization.

212205342331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 212205342331 its reverse (133243502212), we get a palindrome (345448844543).

The spelling of 212205342331 in words is "two hundred twelve billion, two hundred five million, three hundred forty-two thousand, three hundred thirty-one".