89257218121 has 4 divisors (see below), whose sum is σ = 89773155972. Its totient is φ = 88741280272.

The previous prime is 89257218119. The next prime is 89257218173. The reversal of 89257218121 is 12181275298.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87062764096 + 2194454025 = 295064^2 + 46845^2 .

It is a cyclic number.

It is not a de Polignac number, because 89257218121 - 2¹ = 89257218119 is a prime.

It is a super-4 number, since 4×89257218121⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89257218181) 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, 257968666 + ... + 257969011.

It is an arithmetic number, because the mean of its divisors is an integer number (22443288993).

Almost surely, 2^89257218121 is an apocalyptic number.

It is an amenable number.

89257218121 is a deficient number, since it is larger than the sum of its proper divisors (515937851).

89257218121 is a wasteful number, since it uses less digits than its factorization.

89257218121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515937850.

The product of its digits is 161280, while the sum is 46.

The spelling of 89257218121 in words is "eighty-nine billion, two hundred fifty-seven million, two hundred eighteen thousand, one hundred twenty-one".