1321312112 has 40 divisors (see below), whose sum is σ = 2589155712. Its totient is φ = 653182400.

The previous prime is 1321312103. The next prime is 1321312141. The reversal of 1321312112 is 2112131231.

It is a congruent number.

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, 650843 + ... + 652869.

Almost surely, 2^1321312112 is an apocalyptic number.

It is an amenable number.

1321312112 is a deficient number, since it is larger than the sum of its proper divisors (1267843600).

1321312112 is a wasteful number, since it uses less digits than its factorization.

1321312112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477 (or 2471 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1321312112 is about 36349.8571111359. The cubic root of 1321312112 is about 1097.3246588326.

Adding to 1321312112 its reverse (2112131231), we get a palindrome (3433443343).

The spelling of 1321312112 in words is "one billion, three hundred twenty-one million, three hundred twelve thousand, one hundred twelve".