312312111212 has 24 divisors (see below), whose sum is σ = 573941641056. Its totient is φ = 148415275008.

The previous prime is 312312111149. The next prime is 312312111217. The reversal of 312312111212 is 212111213213.

It is a super-2 number, since 2×312312111212² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312312111217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10796693 + ... + 10825580.

It is an arithmetic number, because the mean of its divisors is an integer number (23914235044).

Almost surely, 2^312312111212 is an apocalyptic number.

It is an amenable number.

312312111212 is a deficient number, since it is larger than the sum of its proper divisors (261629529844).

312312111212 is a wasteful number, since it uses less digits than its factorization.

312312111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21622457 (or 21622455 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

Adding to 312312111212 its reverse (212111213213), we get a palindrome (524423324425).

The spelling of 312312111212 in words is "three hundred twelve billion, three hundred twelve million, one hundred eleven thousand, two hundred twelve".