1312126211 has 8 divisors (see below), whose sum is σ = 1435152384. Its totient is φ = 1189723720.

The previous prime is 1312126177. The next prime is 1312126217. The reversal of 1312126211 is 1126212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312126211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312126217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151511 + ... + 159936.

It is an arithmetic number, because the mean of its divisors is an integer number (179394048).

Almost surely, 2^1312126211 is an apocalyptic number.

1312126211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1312126211 is a deficient number, since it is larger than the sum of its proper divisors (123026173).

1312126211 is a wasteful number, since it uses less digits than its factorization.

1312126211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311841.

The product of its digits is 144, while the sum is 20.

The square root of 1312126211 is about 36223.2827198199. The cubic root of 1312126211 is about 1094.7758375747.

Adding to 1312126211 its reverse (1126212131), we get a palindrome (2438338342).

The spelling of 1312126211 in words is "one billion, three hundred twelve million, one hundred twenty-six thousand, two hundred eleven".