1213100323 has 4 divisors (see below), whose sum is σ = 1217417688. Its totient is φ = 1208782960.

The previous prime is 1213100321. The next prime is 1213100341. The reversal of 1213100323 is 3230013121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213100323 - 2¹ = 1213100321 is a prime.

It is a super-2 number, since 2×1213100323² = 2943224787325408658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213100297 and 1213100306.

It is not an unprimeable number, because it can be changed into a prime (1213100321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158261 + ... + 2158822.

It is an arithmetic number, because the mean of its divisors is an integer number (304354422).

Almost surely, 2^1213100323 is an apocalyptic number.

1213100323 is a deficient number, since it is larger than the sum of its proper divisors (4317365).

1213100323 is an equidigital number, since it uses as much as digits as its factorization.

1213100323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317364.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1213100323 is about 34829.5897621548. The cubic root of 1213100323 is about 1066.5115738157.

Adding to 1213100323 its reverse (3230013121), we get a palindrome (4443113444).

The spelling of 1213100323 in words is "one billion, two hundred thirteen million, one hundred thousand, three hundred twenty-three".