1213230213 has 36 divisors (see below), whose sum is σ = 1907720100. Its totient is φ = 742629888.

The previous prime is 1213230209. The next prime is 1213230241. The reversal of 1213230213 is 3120323121.

It can be written as a sum of positive squares in 6 ways, for example, as 49533444 + 1163696769 = 7038^2 + 34113^2 .

It is not a de Polignac number, because 1213230213 - 2² = 1213230209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213230113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 297613 + ... + 301661.

It is an arithmetic number, because the mean of its divisors is an integer number (52992225).

Almost surely, 2^1213230213 is an apocalyptic number.

1213230213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1213230213 is a deficient number, since it is larger than the sum of its proper divisors (694489887).

1213230213 is a wasteful number, since it uses less digits than its factorization.

1213230213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278 (or 4262 counting only the distinct ones).

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

The square root of 1213230213 is about 34831.4543624007. The cubic root of 1213230213 is about 1066.5496372365.

Adding to 1213230213 its reverse (3120323121), we get a palindrome (4333553334).

The spelling of 1213230213 in words is "one billion, two hundred thirteen million, two hundred thirty thousand, two hundred thirteen".