1212418013 has 4 divisors (see below), whose sum is σ = 1214020380. Its totient is φ = 1210815648.

The previous prime is 1212418007. The next prime is 1212418049. The reversal of 1212418013 is 3108142121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3108142121 = 7 ⋅444020303.

It can be written as a sum of positive squares in 2 ways, for example, as 897781369 + 314636644 = 29963^2 + 17738^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212418013 - 2⁸ = 1212417757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212418013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212412013) 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, 800048 + ... + 801561.

It is an arithmetic number, because the mean of its divisors is an integer number (303505095).

Almost surely, 2^1212418013 is an apocalyptic number.

It is an amenable number.

1212418013 is a deficient number, since it is larger than the sum of its proper divisors (1602367).

1212418013 is an equidigital number, since it uses as much as digits as its factorization.

1212418013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602366.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1212418013 is about 34819.7934083475. The cubic root of 1212418013 is about 1066.3115826660.

The spelling of 1212418013 in words is "one billion, two hundred twelve million, four hundred eighteen thousand, thirteen".