312122201111 has 24 divisors (see below), whose sum is σ = 382255602480. Its totient is φ = 253409409792.

The previous prime is 312122201093. The next prime is 312122201113. The reversal of 312122201111 is 111102221213.

It is a happy number.

It is not a de Polignac number, because 312122201111 - 2²² = 312118006807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312122201111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312122201113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6153791 + ... + 6204303.

It is an arithmetic number, because the mean of its divisors is an integer number (15927316770).

Almost surely, 2^312122201111 is an apocalyptic number.

312122201111 is a deficient number, since it is larger than the sum of its proper divisors (70133401369).

312122201111 is a wasteful number, since it uses less digits than its factorization.

312122201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57183 (or 57176 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 312122201111 its reverse (111102221213), we get a palindrome (423224422324).

The spelling of 312122201111 in words is "three hundred twelve billion, one hundred twenty-two million, two hundred one thousand, one hundred eleven".