850218121 has 8 divisors (see below), whose sum is σ = 878169600. Its totient is φ = 822299520.

The previous prime is 850218119. The next prime is 850218133. The reversal of 850218121 is 121812058.

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 850218121 - 2¹ = 850218119 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 850218121.

It is not an unprimeable number, because it can be changed into a prime (850218181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51300 + ... + 65818.

It is an arithmetic number, because the mean of its divisors is an integer number (109771200).

Almost surely, 2^850218121 is an apocalyptic number.

It is an amenable number.

850218121 is a deficient number, since it is larger than the sum of its proper divisors (27951479).

850218121 is a wasteful number, since it uses less digits than its factorization.

850218121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16439.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 850218121 is about 29158.4999785654. The cubic root of 850218121 is about 947.3492573522.

The spelling of 850218121 in words is "eight hundred fifty million, two hundred eighteen thousand, one hundred twenty-one".