1312232111 has 2 divisors, whose sum is σ = 1312232112. Its totient is φ = 1312232110.

The previous prime is 1312232099. The next prime is 1312232113. The reversal of 1312232111 is 1112322131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1112322131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312232111 is a prime.

It is a super-2 number, since 2×1312232111² = 3443906226279032642, which contains 22 as substring.

Together with 1312232113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312232111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312232113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656116055 + 656116056.

It is an arithmetic number, because the mean of its divisors is an integer number (656116056).

Almost surely, 2^1312232111 is an apocalyptic number.

1312232111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312232111 is an equidigital number, since it uses as much as digits as its factorization.

1312232111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 17.

The square root of 1312232111 is about 36224.7444573457. The cubic root of 1312232111 is about 1094.8052894270.

Adding to 1312232111 its reverse (1112322131), we get a palindrome (2424554242).

The spelling of 1312232111 in words is "one billion, three hundred twelve million, two hundred thirty-two thousand, one hundred eleven".