1321054218 has 64 divisors (see below), whose sum is σ = 3209932800. Its totient is φ = 399397680.

The previous prime is 1321054199. The next prime is 1321054261. The reversal of 1321054218 is 8124501231.

1321054218 is a `hidden beast` number, since 132 + 105 + 421 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321054191 and 1321054200.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282205 + ... + 286847.

It is an arithmetic number, because the mean of its divisors is an integer number (50155200).

Almost surely, 2^1321054218 is an apocalyptic number.

1321054218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321054218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1604966400).

1321054218 is an abundant number, since it is smaller than the sum of its proper divisors (1888878582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321054218 is a wasteful number, since it uses less digits than its factorization.

1321054218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5144 (or 5138 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1321054218 is about 36346.3095513148. The cubic root of 1321054218 is about 1097.2532621615.

Adding to 1321054218 its reverse (8124501231), we get a palindrome (9445555449).

The spelling of 1321054218 in words is "one billion, three hundred twenty-one million, fifty-four thousand, two hundred eighteen".