102221202221 has 4 divisors (see below), whose sum is σ = 102224301312. Its totient is φ = 102218103132.

The previous prime is 102221202203. The next prime is 102221202227. The reversal of 102221202221 is 122202122201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102221202221 - 2⁶ = 102221202157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102221202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221202227) 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, 1499531 + ... + 1566216.

It is an arithmetic number, because the mean of its divisors is an integer number (25556075328).

Almost surely, 2^102221202221 is an apocalyptic number.

It is an amenable number.

102221202221 is a deficient number, since it is larger than the sum of its proper divisors (3099091).

102221202221 is an equidigital number, since it uses as much as digits as its factorization.

102221202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099090.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102221202221 its reverse (122202122201), we get a palindrome (224423324422).

The spelling of 102221202221 in words is "one hundred two billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty-one".