1213320112 has 20 divisors (see below), whose sum is σ = 2366589600. Its totient is φ = 602587328.

The previous prime is 1213320061. The next prime is 1213320113. The reversal of 1213320112 is 2110233121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1213320113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252088 + ... + 256855.

It is an arithmetic number, because the mean of its divisors is an integer number (118329480).

Almost surely, 2^1213320112 is an apocalyptic number.

It is an amenable number.

1213320112 is a deficient number, since it is larger than the sum of its proper divisors (1153269488).

1213320112 is a wasteful number, since it uses less digits than its factorization.

1213320112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509100 (or 509094 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1213320112 is about 34832.7448243747. The cubic root of 1213320112 is about 1066.5759799638.

Adding to 1213320112 its reverse (2110233121), we get a palindrome (3323553233).

It can be divided in two parts, 121 and 3320112, that added together give a palindrome (3320233).

The spelling of 1213320112 in words is "one billion, two hundred thirteen million, three hundred twenty thousand, one hundred twelve".