3112221212 has 24 divisors (see below), whose sum is σ = 5777076816. Its totient is φ = 1461955328.

The previous prime is 3112221209. The next prime is 3112221239. The reversal of 3112221212 is 2121222113.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2363 + ... + 78930.

It is an arithmetic number, because the mean of its divisors is an integer number (240711534).

Almost surely, 2^3112221212 is an apocalyptic number.

It is an amenable number.

3112221212 is a deficient number, since it is larger than the sum of its proper divisors (2664855604).

3112221212 is a wasteful number, since it uses less digits than its factorization.

3112221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81877 (or 81875 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 3112221212 is about 55787.2853973018. The cubic root of 3112221212 is about 1460.0133250801.

Adding to 3112221212 its reverse (2121222113), we get a palindrome (5233443325).

Subtracting from 3112221212 its reverse (2121222113), we obtain a palindrome (990999099).

The spelling of 3112221212 in words is "three billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twelve".