102000000201221 has 4 divisors (see below), whose sum is σ = 105517241587500. Its totient is φ = 98482758814944.

The previous prime is 102000000201173. The next prime is 102000000201223. The reversal of 102000000201221 is 122102000000201.

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 49794389832196 + 52205610369025 = 7056514^2 + 7225345^2 .

It is a cyclic number.

It is not a de Polignac number, because 102000000201221 - 2⁶ = 102000000201157 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 (102000000201223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1758620693096 + ... + 1758620693153.

It is an arithmetic number, because the mean of its divisors is an integer number (26379310396875).

Almost surely, 2^{102000000201221} is an apocalyptic number.

It is an amenable number.

102000000201221 is a deficient number, since it is larger than the sum of its proper divisors (3517241386279).

102000000201221 is an equidigital number, since it uses as much as digits as its factorization.

102000000201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517241386278.

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

Adding to 102000000201221 its reverse (122102000000201), we get a palindrome (224102000201422).

The spelling of 102000000201221 in words is "one hundred two trillion, two hundred one thousand, two hundred twenty-one".