102210220 has 72 divisors (see below), whose sum is σ = 250526304. Its totient is φ = 34311168.

The previous prime is 102210211. The next prime is 102210221. The reversal of 102210220 is 22012201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 102210197 and 102210206.

It is not an unprimeable number, because it can be changed into a prime (102210221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 745992 + ... + 746128.

It is an arithmetic number, because the mean of its divisors is an integer number (3479532).

Almost surely, 2^102210220 is an apocalyptic number.

102210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125263152).

102210220 is an abundant number, since it is smaller than the sum of its proper divisors (148316084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102210220 is a wasteful number, since it uses less digits than its factorization.

102210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 102210220 is about 10109.9070223222. The cubic root of 102210220 is about 467.5536385023.

Adding to 102210220 its reverse (22012201), we get a palindrome (124222421).

The spelling of 102210220 in words is "one hundred two million, two hundred ten thousand, two hundred twenty".