985682199221 has 4 divisors (see below), whose sum is σ = 985689344652. Its totient is φ = 985675053792.

The previous prime is 985682199211. The next prime is 985682199223. The reversal of 985682199221 is 122991286589.

It is a happy number.

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 728486148196 + 257196051025 = 853514^2 + 507145^2 .

It is a cyclic number.

It is not a de Polignac number, because 985682199221 - 2²⁶ = 985615090357 is a prime.

It is a super-2 number, since 2×985682199221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985682199223) 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, 3361640 + ... + 3643073.

It is an arithmetic number, because the mean of its divisors is an integer number (246422336163).

Almost surely, 2^985682199221 is an apocalyptic number.

It is an amenable number.

985682199221 is a deficient number, since it is larger than the sum of its proper divisors (7145431).

985682199221 is a wasteful number, since it uses less digits than its factorization.

985682199221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7145430.

The product of its digits is 11197440, while the sum is 62.

The spelling of 985682199221 in words is "nine hundred eighty-five billion, six hundred eighty-two million, one hundred ninety-nine thousand, two hundred twenty-one".