1213323106 has 4 divisors (see below), whose sum is σ = 1819984662. Its totient is φ = 606661552.

The previous prime is 1213323103. The next prime is 1213323113. The reversal of 1213323106 is 6013233121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6013233121 = 7 ⋅859033303.

It can be written as a sum of positive squares in only one way, i.e., 792704025 + 420619081 = 28155^2 + 20509^2 .

It is not an unprimeable number, because it can be changed into a prime (1213323103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303330775 + ... + 303330778.

Almost surely, 2^1213323106 is an apocalyptic number.

1213323106 is a deficient number, since it is larger than the sum of its proper divisors (606661556).

1213323106 is an equidigital number, since it uses as much as digits as its factorization.

1213323106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606661555.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1213323106 is about 34832.7878011508. The cubic root of 1213323106 is about 1066.5768572606.

Adding to 1213323106 its reverse (6013233121), we get a palindrome (7226556227).

The spelling of 1213323106 in words is "one billion, two hundred thirteen million, three hundred twenty-three thousand, one hundred six".