212212331 has 2 divisors, whose sum is σ = 212212332. Its totient is φ = 212212330.

The previous prime is 212212313. The next prime is 212212339. The reversal of 212212331 is 133212212.

212212331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (212212313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212212331 is a prime.

It is a super-2 number, since 2×212212331² = 90068146856907122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212212339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106165 + 106106166.

It is an arithmetic number, because the mean of its divisors is an integer number (106106166).

Almost surely, 2^212212331 is an apocalyptic number.

212212331 is a deficient number, since it is larger than the sum of its proper divisors (1).

212212331 is an equidigital number, since it uses as much as digits as its factorization.

212212331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 212212331 is about 14567.5094302355. The cubic root of 212212331 is about 596.4721974082.

Adding to 212212331 its reverse (133212212), we get a palindrome (345424543).

The spelling of 212212331 in words is "two hundred twelve million, two hundred twelve thousand, three hundred thirty-one".