1212331231 has 2 divisors, whose sum is σ = 1212331232. Its totient is φ = 1212331230.

The previous prime is 1212331223. The next prime is 1212331243. The reversal of 1212331231 is 1321332121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212331231 - 2³ = 1212331223 is a prime.

It is a super-2 number, since 2×1212331231² = 2939494027315950722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212331199 and 1212331208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212331831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606165615 + 606165616.

It is an arithmetic number, because the mean of its divisors is an integer number (606165616).

Almost surely, 2^1212331231 is an apocalyptic number.

1212331231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212331231 is an equidigital number, since it uses as much as digits as its factorization.

1212331231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 1212331231 is about 34818.5472270168. The cubic root of 1212331231 is about 1066.2861407093.

Adding to 1212331231 its reverse (1321332121), we get a palindrome (2533663352).

The spelling of 1212331231 in words is "one billion, two hundred twelve million, three hundred thirty-one thousand, two hundred thirty-one".