1312213113 has 6 divisors (see below), whose sum is σ = 1895418954. Its totient is φ = 874808736.

The previous prime is 1312213079. The next prime is 1312213117. The reversal of 1312213113 is 3113122131.

1312213113 is a `hidden beast` number, since 131 + 221 + 311 + 3 = 666.

1312213113 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1311381369 + 831744 = 36213^2 + 912^2 .

It is not a de Polignac number, because 1312213113 - 2¹⁰ = 1312212089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1312213117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72900720 + ... + 72900737.

It is an arithmetic number, because the mean of its divisors is an integer number (315903159).

Almost surely, 2^1312213113 is an apocalyptic number.

It is an amenable number.

1312213113 is a deficient number, since it is larger than the sum of its proper divisors (583205841).

1312213113 is a wasteful number, since it uses less digits than its factorization.

1312213113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145801463 (or 145801460 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1312213113 is about 36224.4822323246. The cubic root of 1312213113 is about 1094.8000060093.

Adding to 1312213113 its reverse (3113122131), we get a palindrome (4425335244).

The spelling of 1312213113 in words is "one billion, three hundred twelve million, two hundred thirteen thousand, one hundred thirteen".