312111012122 has 32 divisors (see below), whose sum is σ = 576243787392. Its totient is φ = 123464165184.

The previous prime is 312111012121. The next prime is 312111012127. The reversal of 312111012122 is 221210111213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 312111012122.

It is not an unprimeable number, because it can be changed into a prime (312111012121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3131753 + ... + 3229875.

It is an arithmetic number, because the mean of its divisors is an integer number (18007618356).

Almost surely, 2^312111012122 is an apocalyptic number.

312111012122 is a deficient number, since it is larger than the sum of its proper divisors (264132775270).

312111012122 is a wasteful number, since it uses less digits than its factorization.

312111012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115622.

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

Adding to 312111012122 its reverse (221210111213), we get a palindrome (533321123335).

Subtracting from 312111012122 its reverse (221210111213), we obtain a palindrome (90900900909).

The spelling of 312111012122 in words is "three hundred twelve billion, one hundred eleven million, twelve thousand, one hundred twenty-two".