102102120221 has 8 divisors (see below), whose sum is σ = 103153203000. Its totient is φ = 101055915520.

The previous prime is 102102120217. The next prime is 102102120227. The reversal of 102102120221 is 122021201201.

It can be written as a sum of positive squares in 4 ways, for example, as 12924025 + 102089196196 = 3595^2 + 319514^2 .

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 102102120221 - 2² = 102102120217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102102120196 and 102102120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102120227) 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, 1177436 + ... + 1261173.

It is an arithmetic number, because the mean of its divisors is an integer number (12894150375).

Almost surely, 2^102102120221 is an apocalyptic number.

It is an amenable number.

102102120221 is a deficient number, since it is larger than the sum of its proper divisors (1051082779).

102102120221 is a wasteful number, since it uses less digits than its factorization.

102102120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439039.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102102120221 its reverse (122021201201), we get a palindrome (224123321422).

The spelling of 102102120221 in words is "one hundred two billion, one hundred two million, one hundred twenty thousand, two hundred twenty-one".