102002201221 has 8 divisors (see below), whose sum is σ = 102222774360. Its totient is φ = 101781808128.

The previous prime is 102002201219. The next prime is 102002201239. The reversal of 102002201221 is 122102200201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3613332321 + 98388868900 = 60111^2 + 313670^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102002201221 - 2¹ = 102002201219 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 (102002201201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121755 + ... + 1209271.

It is an arithmetic number, because the mean of its divisors is an integer number (12777846795).

Almost surely, 2^102002201221 is an apocalyptic number.

It is an amenable number.

102002201221 is a deficient number, since it is larger than the sum of its proper divisors (220573139).

102002201221 is an equidigital number, since it uses as much as digits as its factorization.

102002201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90023.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102002201221 its reverse (122102200201), we get a palindrome (224104401422).

The spelling of 102002201221 in words is "one hundred two billion, two million, two hundred one thousand, two hundred twenty-one".