1213212212 has 12 divisors (see below), whose sum is σ = 2123832480. Its totient is φ = 606402936.

The previous prime is 1213212199. The next prime is 1213212239. The reversal of 1213212212 is 2122123121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36938 + ... + 61569.

It is an arithmetic number, because the mean of its divisors is an integer number (176986040).

Almost surely, 2^1213212212 is an apocalyptic number.

It is an amenable number.

1213212212 is a deficient number, since it is larger than the sum of its proper divisors (910620268).

1213212212 is a wasteful number, since it uses less digits than its factorization.

1213212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101590 (or 101588 counting only the distinct ones).

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

The square root of 1213212212 is about 34831.1959599437. The cubic root of 1213212212 is about 1066.5443623226.

Adding to 1213212212 its reverse (2122123121), we get a palindrome (3335335333).

The spelling of 1213212212 in words is "one billion, two hundred thirteen million, two hundred twelve thousand, two hundred twelve".