1321113212 has 12 divisors (see below), whose sum is σ = 2391670680. Its totient is φ = 637778736.

The previous prime is 1321113109. The next prime is 1321113223. The reversal of 1321113212 is 2123111231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5694338 + ... + 5694569.

It is an arithmetic number, because the mean of its divisors is an integer number (199305890).

Almost surely, 2^1321113212 is an apocalyptic number.

It is an amenable number.

1321113212 is a deficient number, since it is larger than the sum of its proper divisors (1070557468).

1321113212 is a wasteful number, since it uses less digits than its factorization.

1321113212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388940 (or 11388938 counting only the distinct ones).

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

The square root of 1321113212 is about 36347.1210964500. The cubic root of 1321113212 is about 1097.2695951765.

Adding to 1321113212 its reverse (2123111231), we get a palindrome (3444224443).

The spelling of 1321113212 in words is "one billion, three hundred twenty-one million, one hundred thirteen thousand, two hundred twelve".