212112031231 has 2 divisors, whose sum is σ = 212112031232. Its totient is φ = 212112031230.

The previous prime is 212112031213. The next prime is 212112031247. The reversal of 212112031231 is 132130211212.

Together with previous prime (212112031213) 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 not a de Polignac number, because 212112031231 - 2²⁹ = 211575160319 is a prime.

It is a super-2 number, since 2×212112031231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212112031199 and 212112031208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212112031931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056015615 + 106056015616.

It is an arithmetic number, because the mean of its divisors is an integer number (106056015616).

Almost surely, 2^212112031231 is an apocalyptic number.

212112031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112031231 is an equidigital number, since it uses as much as digits as its factorization.

212112031231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212112031231 its reverse (132130211212), we get a palindrome (344242242443).

The spelling of 212112031231 in words is "two hundred twelve billion, one hundred twelve million, thirty-one thousand, two hundred thirty-one".