312112101211 has 4 divisors (see below), whose sum is σ = 325682192592. Its totient is φ = 298542009832.

The previous prime is 312112101187. The next prime is 312112101227. The reversal of 312112101211 is 112101211213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112101211213 = 2129 ⋅52654397.

It is not a de Polignac number, because 312112101211 - 2¹¹ = 312112099163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312112101271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6785045656 + ... + 6785045701.

It is an arithmetic number, because the mean of its divisors is an integer number (81420548148).

Almost surely, 2^312112101211 is an apocalyptic number.

312112101211 is a deficient number, since it is larger than the sum of its proper divisors (13570091381).

312112101211 is a wasteful number, since it uses less digits than its factorization.

312112101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13570091380.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 312112101211 its reverse (112101211213), we get a palindrome (424213312424).

The spelling of 312112101211 in words is "three hundred twelve billion, one hundred twelve million, one hundred one thousand, two hundred eleven".