1312112211 has 8 divisors (see below), whose sum is σ = 1825547520. Its totient is φ = 836709192.

The previous prime is 1312112189. The next prime is 1312112227. The reversal of 1312112211 is 1122112131.

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

It is not a de Polignac number, because 1312112211 - 2¹³ = 1312104019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312112281) 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 in 7 ways as a sum of consecutive naturals, for example, 9507991 + ... + 9508128.

It is an arithmetic number, because the mean of its divisors is an integer number (228193440).

Almost surely, 2^1312112211 is an apocalyptic number.

1312112211 is a deficient number, since it is larger than the sum of its proper divisors (513435309).

1312112211 is a wasteful number, since it uses less digits than its factorization.

1312112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19016145.

The product of its digits is 24, while the sum is 15.

The square root of 1312112211 is about 36223.0894734284. The cubic root of 1312112211 is about 1094.7719439157.

Adding to 1312112211 its reverse (1122112131), we get a palindrome (2434224342).

The spelling of 1312112211 in words is "one billion, three hundred twelve million, one hundred twelve thousand, two hundred eleven".