918321121 has 8 divisors (see below), whose sum is σ = 929160000. Its totient is φ = 907544880.

The previous prime is 918321097. The next prime is 918321127. The reversal of 918321121 is 121123819.

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

It is a cyclic number.

It is not a de Polignac number, because 918321121 - 2¹³ = 918312929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 918321121.

It is not an unprimeable number, because it can be changed into a prime (918321127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14166 + ... + 45136.

It is an arithmetic number, because the mean of its divisors is an integer number (116145000).

Almost surely, 2^918321121 is an apocalyptic number.

It is an amenable number.

918321121 is a deficient number, since it is larger than the sum of its proper divisors (10838879).

918321121 is a wasteful number, since it uses less digits than its factorization.

918321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31319.

The product of its digits is 864, while the sum is 28.

The square root of 918321121 is about 30303.8136378905. The cubic root of 918321121 is about 971.9968504163.

The spelling of 918321121 in words is "nine hundred eighteen million, three hundred twenty-one thousand, one hundred twenty-one".