1224120213 has 12 divisors (see below), whose sum is σ = 1769191788. Its totient is φ = 815610240.

The previous prime is 1224120211. The next prime is 1224120221. The reversal of 1224120213 is 3120214221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 419717169 + 804403044 = 20487^2 + 28362^2 .

It is not a de Polignac number, because 1224120213 - 2¹ = 1224120211 is a prime.

It is a super-3 number, since 3×1224120213³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224120211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22278 + ... + 54263.

It is an arithmetic number, because the mean of its divisors is an integer number (147432649).

Almost surely, 2^1224120213 is an apocalyptic number.

It is an amenable number.

1224120213 is a deficient number, since it is larger than the sum of its proper divisors (545071575).

1224120213 is a wasteful number, since it uses less digits than its factorization.

1224120213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78324 (or 78321 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1224120213 is about 34987.4293568419. The cubic root of 1224120213 is about 1069.7312665446.

Adding to 1224120213 its reverse (3120214221), we get a palindrome (4344334434).

The spelling of 1224120213 in words is "one billion, two hundred twenty-four million, one hundred twenty thousand, two hundred thirteen".