1213323105 has 16 divisors (see below), whose sum is σ = 2003940864. Its totient is φ = 626231040.

The previous prime is 1213323103. The next prime is 1213323113. The reversal of 1213323105 is 5013233121.

It is not a de Polignac number, because 1213323105 - 2¹ = 1213323103 is a prime.

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 in 15 ways as a sum of consecutive naturals, for example, 1304184 + ... + 1305113.

It is an arithmetic number, because the mean of its divisors is an integer number (125246304).

Almost surely, 2^1213323105 is an apocalyptic number.

1213323105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213323105 is a deficient number, since it is larger than the sum of its proper divisors (790617759).

1213323105 is a wasteful number, since it uses less digits than its factorization.

1213323105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609336.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1213323105 is about 34832.7877867965. The cubic root of 1213323105 is about 1066.5768569676.

Adding to 1213323105 its reverse (5013233121), we get a palindrome (6226556226).

The spelling of 1213323105 in words is "one billion, two hundred thirteen million, three hundred twenty-three thousand, one hundred five".