1213214345 has 16 divisors (see below), whose sum is σ = 1692040320. Its totient is φ = 817816704.

The previous prime is 1213214339. The next prime is 1213214347. The reversal of 1213214345 is 5434123121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1213214345 - 2⁸ = 1213214089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213214347) 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 15 ways as a sum of consecutive naturals, for example, 291692 + ... + 295821.

It is an arithmetic number, because the mean of its divisors is an integer number (105752520).

Almost surely, 2^1213214345 is an apocalyptic number.

It is an amenable number.

1213214345 is a deficient number, since it is larger than the sum of its proper divisors (478825975).

1213214345 is an equidigital number, since it uses as much as digits as its factorization.

1213214345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587584.

The product of its digits is 2880, while the sum is 26.

The square root of 1213214345 is about 34831.2265790339. The cubic root of 1213214345 is about 1066.5449873679.

Adding to 1213214345 its reverse (5434123121), we get a palindrome (6647337466).

The spelling of 1213214345 in words is "one billion, two hundred thirteen million, two hundred fourteen thousand, three hundred forty-five".