1321213418 has 8 divisors (see below), whose sum is σ = 2264937312. Its totient is φ = 566234316.

The previous prime is 1321213417. The next prime is 1321213441. The reversal of 1321213418 is 8143121231.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321213417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47186180 + ... + 47186207.

It is an arithmetic number, because the mean of its divisors is an integer number (283117164).

Almost surely, 2^1321213418 is an apocalyptic number.

1321213418 is a deficient number, since it is larger than the sum of its proper divisors (943723894).

1321213418 is an equidigital number, since it uses as much as digits as its factorization.

1321213418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94372396.

The product of its digits is 1152, while the sum is 26.

The square root of 1321213418 is about 36348.4995288664. The cubic root of 1321213418 is about 1097.2973369871.

Adding to 1321213418 its reverse (8143121231), we get a palindrome (9464334649).

The spelling of 1321213418 in words is "one billion, three hundred twenty-one million, two hundred thirteen thousand, four hundred eighteen".