312211212 has 48 divisors (see below), whose sum is σ = 737587200. Its totient is φ = 102779712.

The previous prime is 312211183. The next prime is 312211247. The reversal of 312211212 is 212112213.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 312211191 and 312211200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531583 + ... + 532169.

It is an arithmetic number, because the mean of its divisors is an integer number (15366400).

Almost surely, 2^312211212 is an apocalyptic number.

It is an amenable number.

312211212 is an abundant number, since it is smaller than the sum of its proper divisors (425375988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312211212 is a wasteful number, since it uses less digits than its factorization.

312211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 1068 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 312211212 is about 17669.4994835734. The cubic root of 312211212 is about 678.3953020610.

Adding to 312211212 its reverse (212112213), we get a palindrome (524323425).

The spelling of 312211212 in words is "three hundred twelve million, two hundred eleven thousand, two hundred twelve".