1212241312 has 24 divisors (see below), whose sum is σ = 2490366816. Its totient is φ = 579767232.

The previous prime is 1212241309. The next prime is 1212241313. The reversal of 1212241312 is 2131422121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212241312.

It is not an unprimeable number, because it can be changed into a prime (1212241313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822798 + ... + 824269.

It is an arithmetic number, because the mean of its divisors is an integer number (103765284).

Almost surely, 2^1212241312 is an apocalyptic number.

It is an amenable number.

1212241312 is an abundant number, since it is smaller than the sum of its proper divisors (1278125504).

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

1212241312 is a wasteful number, since it uses less digits than its factorization.

1212241312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647100 (or 1647092 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 1212241312 is about 34817.2559516111. The cubic root of 1212241312 is about 1066.2597777947.

Adding to 1212241312 its reverse (2131422121), we get a palindrome (3343663433).

The spelling of 1212241312 in words is "one billion, two hundred twelve million, two hundred forty-one thousand, three hundred twelve".