1121215312 has 20 divisors (see below), whose sum is σ = 2482691296. Its totient is φ = 480520800.

The previous prime is 1121215279. The next prime is 1121215379. The reversal of 1121215312 is 2135121211.

It is a self number, because there is not a number n which added to its sum of digits gives 1121215312.

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, 5005314 + ... + 5005537.

Almost surely, 2^1121215312 is an apocalyptic number.

It is an amenable number.

1121215312 is an abundant number, since it is smaller than the sum of its proper divisors (1361475984).

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

1121215312 is a wasteful number, since it uses less digits than its factorization.

1121215312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010866 (or 10010860 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 1121215312 is about 33484.5533343361. The cubic root of 1121215312 is about 1038.8743096118.

Adding to 1121215312 its reverse (2135121211), we get a palindrome (3256336523).

The spelling of 1121215312 in words is "one billion, one hundred twenty-one million, two hundred fifteen thousand, three hundred twelve".