1213331212 has 24 divisors (see below), whose sum is σ = 2155319712. Its totient is φ = 597542400.

The previous prime is 1213331159. The next prime is 1213331237. The reversal of 1213331212 is 2121333121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213331212.

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, 582012 + ... + 584092.

It is an arithmetic number, because the mean of its divisors is an integer number (89804988).

Almost surely, 2^1213331212 is an apocalyptic number.

It is an amenable number.

1213331212 is a deficient number, since it is larger than the sum of its proper divisors (941988500).

1213331212 is a wasteful number, since it uses less digits than its factorization.

1213331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209 (or 4207 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1213331212 is about 34832.9041568457. The cubic root of 1213331212 is about 1066.5792324600.

Adding to 1213331212 its reverse (2121333121), we get a palindrome (3334664333).

It can be divided in two parts, 121333121 and 2, that multiplied together give a palindrome (242666242).

The spelling of 1213331212 in words is "one billion, two hundred thirteen million, three hundred thirty-one thousand, two hundred twelve".