1212004313 has 4 divisors (see below), whose sum is σ = 1305235428. Its totient is φ = 1118773200.

The previous prime is 1212004289. The next prime is 1212004349. The reversal of 1212004313 is 3134002121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3134002121 = 7177 ⋅436673.

It can be written as a sum of positive squares in 2 ways, for example, as 551874064 + 660130249 = 23492^2 + 25693^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212004313 - 2¹² = 1212000217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212004291 and 1212004300.

It is not an unprimeable number, because it can be changed into a prime (1212004393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46615538 + ... + 46615563.

It is an arithmetic number, because the mean of its divisors is an integer number (326308857).

Almost surely, 2^1212004313 is an apocalyptic number.

1212004313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1212004313 is a deficient number, since it is larger than the sum of its proper divisors (93231115).

1212004313 is an equidigital number, since it uses as much as digits as its factorization.

1212004313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93231114.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1212004313 is about 34813.8523148473. The cubic root of 1212004313 is about 1066.1902869630.

Adding to 1212004313 its reverse (3134002121), we get a palindrome (4346006434).

The spelling of 1212004313 in words is "one billion, two hundred twelve million, four thousand, three hundred thirteen".