1212343618 has 8 divisors (see below), whose sum is σ = 1818664848. Its totient is φ = 606122004.

The previous prime is 1212343603. The next prime is 1212343619. The reversal of 1212343618 is 8163432121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 1212343618.

It is not an unprimeable number, because it can be changed into a prime (1212343619) 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, 28005 + ... + 56647.

It is an arithmetic number, because the mean of its divisors is an integer number (227333106).

Almost surely, 2^1212343618 is an apocalyptic number.

1212343618 is a deficient number, since it is larger than the sum of its proper divisors (606321230).

1212343618 is a wasteful number, since it uses less digits than its factorization.

1212343618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49808.

The product of its digits is 6912, while the sum is 31.

The square root of 1212343618 is about 34818.7251058967. The cubic root of 1212343618 is about 1066.2897722914.

Adding to 1212343618 its reverse (8163432121), we get a palindrome (9375775739).

The spelling of 1212343618 in words is "one billion, two hundred twelve million, three hundred forty-three thousand, six hundred eighteen".