1212215323 has 4 divisors (see below), whose sum is σ = 1322416728. Its totient is φ = 1102013920.

The previous prime is 1212215321. The next prime is 1212215327. The reversal of 1212215323 is 3235122121.

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 1212215323 - 2¹ = 1212215321 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212215294 and 1212215303.

It is not an unprimeable number, because it can be changed into a prime (1212215321) 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 3 ways as a sum of consecutive naturals, for example, 55100686 + ... + 55100707.

It is an arithmetic number, because the mean of its divisors is an integer number (330604182).

Almost surely, 2^1212215323 is an apocalyptic number.

1212215323 is a deficient number, since it is larger than the sum of its proper divisors (110201405).

1212215323 is a wasteful number, since it uses less digits than its factorization.

1212215323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110201404.

The product of its digits is 720, while the sum is 22.

The square root of 1212215323 is about 34816.8827295035. The cubic root of 1212215323 is about 1066.2521579633.

Adding to 1212215323 its reverse (3235122121), we get a palindrome (4447337444).

The spelling of 1212215323 in words is "one billion, two hundred twelve million, two hundred fifteen thousand, three hundred twenty-three".