102221205 has 16 divisors (see below), whose sum is σ = 163703040. Its totient is φ = 54468288.

The previous prime is 102221183. The next prime is 102221209. The reversal of 102221205 is 502122201.

It is not a de Polignac number, because 102221205 - 2¹⁴ = 102204821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18951 + ... + 23739.

It is an arithmetic number, because the mean of its divisors is an integer number (10231440).

Almost surely, 2^102221205 is an apocalyptic number.

102221205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102221205 is a deficient number, since it is larger than the sum of its proper divisors (61481835).

102221205 is a wasteful number, since it uses less digits than its factorization.

102221205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 102221205 is about 10110.4502867083. The cubic root of 102221205 is about 467.5703879452.

Adding to 102221205 its reverse (502122201), we get a palindrome (604343406).

The spelling of 102221205 in words is "one hundred two million, two hundred twenty-one thousand, two hundred five".