102102221 has 32 divisors (see below), whose sum is σ = 124104960. Its totient is φ = 83026944.

The previous prime is 102102199. The next prime is 102102229. The reversal of 102102221 is 122201201.

It is a happy number.

It is not a de Polignac number, because 102102221 - 2⁶ = 102102157 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 (102102229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269210 + ... + 269588.

It is an arithmetic number, because the mean of its divisors is an integer number (3878280).

Almost surely, 2^102102221 is an apocalyptic number.

It is an amenable number.

102102221 is a deficient number, since it is larger than the sum of its proper divisors (22002739).

102102221 is a wasteful number, since it uses less digits than its factorization.

102102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485.

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

The square root of 102102221 is about 10104.5643646819. The cubic root of 102102221 is about 467.3889024615.

Adding to 102102221 its reverse (122201201), we get a palindrome (224303422).

The spelling of 102102221 in words is "one hundred two million, one hundred two thousand, two hundred twenty-one".