221065101036 has 144 divisors (see below), whose sum is σ = 641315211264. Its totient is φ = 63678181248.

The previous prime is 221065100917. The next prime is 221065101071. The reversal of 221065101036 is 630101560122.

221065101036 is a `hidden beast` number, since 2 + 2 + 1 + 0 + 651 + 0 + 1 + 0 + 3 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 287425 + ... + 724391.

It is an arithmetic number, because the mean of its divisors is an integer number (4453577856).

Almost surely, 2^221065101036 is an apocalyptic number.

221065101036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221065101036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320657605632).

221065101036 is an abundant number, since it is smaller than the sum of its proper divisors (420250110228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221065101036 is a wasteful number, since it uses less digits than its factorization.

221065101036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437060 (or 437055 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 221065101036 its reverse (630101560122), we get a palindrome (851166661158).

The spelling of 221065101036 in words is "two hundred twenty-one billion, sixty-five million, one hundred one thousand, thirty-six".