1212311304 has 24 divisors (see below), whose sum is σ = 3283343310. Its totient is φ = 404103744.

The previous prime is 1212311299. The next prime is 1212311311. The reversal of 1212311304 is 4031132121.

It can be written as a sum of positive squares in only one way, i.e., 990360900 + 221950404 = 31470^2 + 14898^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8418757 + ... + 8418900.

Almost surely, 2^1212311304 is an apocalyptic number.

It is an amenable number.

1212311304 is an abundant number, since it is smaller than the sum of its proper divisors (2071032006).

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

1212311304 is a wasteful number, since it uses less digits than its factorization.

1212311304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16837669 (or 16837662 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1212311304 is about 34818.2610708806. The cubic root of 1212311304 is about 1066.2802985214.

Adding to 1212311304 its reverse (4031132121), we get a palindrome (5243443425).

The spelling of 1212311304 in words is "one billion, two hundred twelve million, three hundred eleven thousand, three hundred four".