100002201221 has 4 divisors (see below), whose sum is σ = 107694678252. Its totient is φ = 92309724192.

The previous prime is 100002201209. The next prime is 100002201263. The reversal of 100002201221 is 122102200001.

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 5454561025 + 94547640196 = 73855^2 + 307486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100002201221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002204221) 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, 3846238496 + ... + 3846238521.

It is an arithmetic number, because the mean of its divisors is an integer number (26923669563).

Almost surely, 2^100002201221 is an apocalyptic number.

It is an amenable number.

100002201221 is a deficient number, since it is larger than the sum of its proper divisors (7692477031).

100002201221 is an equidigital number, since it uses as much as digits as its factorization.

100002201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7692477030.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100002201221 its reverse (122102200001), we get a palindrome (222104401222).

The spelling of 100002201221 in words is "one hundred billion, two million, two hundred one thousand, two hundred twenty-one".