102120202221 has 8 divisors (see below), whose sum is σ = 136483692384. Its totient is φ = 67918423440.

The previous prime is 102120202213. The next prime is 102120202243. The reversal of 102120202221 is 122202021201.

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

It is not a de Polignac number, because 102120202221 - 2³ = 102120202213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102120202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120209221) 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, 40426371 + ... + 40428896.

It is an arithmetic number, because the mean of its divisors is an integer number (17060461548).

Almost surely, 2^102120202221 is an apocalyptic number.

It is an amenable number.

102120202221 is a deficient number, since it is larger than the sum of its proper divisors (34363490163).

102120202221 is an equidigital number, since it uses as much as digits as its factorization.

102120202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80855691.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102120202221 its reverse (122202021201), we get a palindrome (224322223422).

The spelling of 102120202221 in words is "one hundred two billion, one hundred twenty million, two hundred two thousand, two hundred twenty-one".