85854534121 has 4 divisors (see below), whose sum is σ = 90904800852. Its totient is φ = 80804267392.

The previous prime is 85854534109. The next prime is 85854534137. The reversal of 85854534121 is 12143545858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12143545858 = 2 ⋅6071772929.

It can be written as a sum of positive squares in 2 ways, for example, as 45377520400 + 40477013721 = 213020^2 + 201189^2 .

It is a cyclic number.

It is not a de Polignac number, because 85854534121 - 2⁵ = 85854534089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85854534221) 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, 2525133340 + ... + 2525133373.

It is an arithmetic number, because the mean of its divisors is an integer number (22726200213).

Almost surely, 2^85854534121 is an apocalyptic number.

It is an amenable number.

85854534121 is a deficient number, since it is larger than the sum of its proper divisors (5050266731).

85854534121 is a wasteful number, since it uses less digits than its factorization.

85854534121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050266730.

The product of its digits is 768000, while the sum is 46.

The spelling of 85854534121 in words is "eighty-five billion, eight hundred fifty-four million, five hundred thirty-four thousand, one hundred twenty-one".