1213412213 has 8 divisors (see below), whose sum is σ = 1383619608. Its totient is φ = 1054185984.

The previous prime is 1213412209. The next prime is 1213412273. The reversal of 1213412213 is 3122143121.

It can be written as a sum of positive squares in 4 ways, for example, as 770884 + 1212641329 = 878^2 + 34823^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213412213 - 2² = 1213412209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213412273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2745056 + ... + 2745497.

It is an arithmetic number, because the mean of its divisors is an integer number (172952451).

Almost surely, 2^1213412213 is an apocalyptic number.

1213412213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1213412213 is a deficient number, since it is larger than the sum of its proper divisors (170207395).

1213412213 is a wasteful number, since it uses less digits than its factorization.

1213412213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490583.

The product of its digits is 288, while the sum is 20.

The square root of 1213412213 is about 34834.0668455465. The cubic root of 1213412213 is about 1066.6029665844.

Adding to 1213412213 its reverse (3122143121), we get a palindrome (4335555334).

The spelling of 1213412213 in words is "one billion, two hundred thirteen million, four hundred twelve thousand, two hundred thirteen".