98765443332221 has 4 divisors (see below), whose sum is σ = 98765841332700. Its totient is φ = 98765045331744.

The previous prime is 98765443332113. The next prime is 98765443332253. The reversal of 98765443332221 is 12223334456789.

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 20687260305625 + 78078183026596 = 4548325^2 + 8836186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98765443332221 is a prime.

It is a super-2 number, since 2×98765443332221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98765443832221) 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, 198627776 + ... + 199124393.

It is an arithmetic number, because the mean of its divisors is an integer number (24691460333175).

Almost surely, 2^{98765443332221} is an apocalyptic number.

It is an amenable number.

98765443332221 is a deficient number, since it is larger than the sum of its proper divisors (398000479).

98765443332221 is a wasteful number, since it uses less digits than its factorization.

98765443332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398000478.

The product of its digits is 52254720, while the sum is 59.

The spelling of 98765443332221 in words is "ninety-eight trillion, seven hundred sixty-five billion, four hundred forty-three million, three hundred thirty-two thousand, two hundred twenty-one".