1212424013 has 2 divisors, whose sum is σ = 1212424014. Its totient is φ = 1212424012.

The previous prime is 1212424009. The next prime is 1212424019. The reversal of 1212424013 is 3104242121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1156204009 + 56220004 = 34003^2 + 7498^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212424013 - 2² = 1212424009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212424019) 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 as a sum of consecutive naturals, namely, 606212006 + 606212007.

It is an arithmetic number, because the mean of its divisors is an integer number (606212007).

Almost surely, 2^1212424013 is an apocalyptic number.

It is an amenable number.

1212424013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212424013 is an equidigital number, since it uses as much as digits as its factorization.

1212424013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1212424013 is about 34819.8795661329. The cubic root of 1212424013 is about 1066.3133416465.

Adding to 1212424013 its reverse (3104242121), we get a palindrome (4316666134).

The spelling of 1212424013 in words is "one billion, two hundred twelve million, four hundred twenty-four thousand, thirteen".