1224201613 has 2 divisors, whose sum is σ = 1224201614. Its totient is φ = 1224201612.

The previous prime is 1224201599. The next prime is 1224201631. The reversal of 1224201613 is 3161024221.

Together with next prime (1224201631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1222411369 + 1790244 = 34963^2 + 1338^2 .

It is an emirp because it is prime and its reverse (3161024221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1224201613 - 2⁵ = 1224201581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224202613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612100806 + 612100807.

It is an arithmetic number, because the mean of its divisors is an integer number (612100807).

Almost surely, 2^1224201613 is an apocalyptic number.

It is an amenable number.

1224201613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224201613 is an equidigital number, since it uses as much as digits as its factorization.

1224201613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1224201613 is about 34988.5926124501. The cubic root of 1224201613 is about 1069.7549772320.

Adding to 1224201613 its reverse (3161024221), we get a palindrome (4385225834).

The spelling of 1224201613 in words is "one billion, two hundred twenty-four million, two hundred one thousand, six hundred thirteen".