312122111211 has 16 divisors (see below), whose sum is σ = 464202372000. Its totient is φ = 207271747584.

The previous prime is 312122111173. The next prime is 312122111219. The reversal of 312122111211 is 112111221213.

It is a happy number.

312122111211 is a `hidden beast` number, since 31 + 212 + 211 + 1 + 211 = 666.

It is not a de Polignac number, because 312122111211 - 2⁷ = 312122111083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312122111219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22483486 + ... + 22497363.

It is an arithmetic number, because the mean of its divisors is an integer number (29012648250).

Almost surely, 2^312122111211 is an apocalyptic number.

312122111211 is a deficient number, since it is larger than the sum of its proper divisors (152080260789).

312122111211 is a wasteful number, since it uses less digits than its factorization.

312122111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44981115 (or 44981109 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 312122111211 its reverse (112111221213), we get a palindrome (424233332424).

The spelling of 312122111211 in words is "three hundred twelve billion, one hundred twenty-two million, one hundred eleven thousand, two hundred eleven".