1212302313 has 12 divisors (see below), whose sum is σ = 1775092020. Its totient is φ = 797129856.

The previous prime is 1212302281. The next prime is 1212302327. The reversal of 1212302313 is 3132032121.

1212302313 is a `hidden beast` number, since 121 + 230 + 2 + 313 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 369677529 + 842624784 = 19227^2 + 29028^2 .

It is not a de Polignac number, because 1212302313 - 2⁵ = 1212302281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212302393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 921948 + ... + 923261.

It is an arithmetic number, because the mean of its divisors is an integer number (147924335).

Almost surely, 2^1212302313 is an apocalyptic number.

It is an amenable number.

1212302313 is a deficient number, since it is larger than the sum of its proper divisors (562789707).

1212302313 is a wasteful number, since it uses less digits than its factorization.

1212302313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845288 (or 1845285 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1212302313 is about 34818.1319573581. The cubic root of 1212302313 is about 1066.2776625236.

Adding to 1212302313 its reverse (3132032121), we get a palindrome (4344334434).

The spelling of 1212302313 in words is "one billion, two hundred twelve million, three hundred two thousand, three hundred thirteen".