321111212 has 6 divisors (see below), whose sum is σ = 561944628. Its totient is φ = 160555604.

The previous prime is 321111209. The next prime is 321111227. The reversal of 321111212 is 212111123.

321111212 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×321111212² = 206224820944217888, which contains 22 as substring.

321111212 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40138898 + ... + 40138905.

It is an arithmetic number, because the mean of its divisors is an integer number (93657438).

Almost surely, 2^321111212 is an apocalyptic number.

It is an amenable number.

321111212 is a deficient number, since it is larger than the sum of its proper divisors (240833416).

321111212 is a wasteful number, since it uses less digits than its factorization.

321111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80277807 (or 80277805 counting only the distinct ones).

The product of its digits is 24, while the sum is 14.

The square root of 321111212 is about 17919.5762226678. The cubic root of 321111212 is about 684.7811914134.

Adding to 321111212 its reverse (212111123), we get a palindrome (533222335).

It can be divided in two parts, 32111121 and 2, that added together give a palindrome (32111123).

The spelling of 321111212 in words is "three hundred twenty-one million, one hundred eleven thousand, two hundred twelve".