102012220 has 12 divisors (see below), whose sum is σ = 214225704. Its totient is φ = 40804880.

The previous prime is 102012217. The next prime is 102012221. The reversal of 102012220 is 22210201.

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 = 102012197 and 102012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550286 + ... + 2550325.

It is an arithmetic number, because the mean of its divisors is an integer number (17852142).

Almost surely, 2^102012220 is an apocalyptic number.

102012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102012220 is an abundant number, since it is smaller than the sum of its proper divisors (112213484).

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

102012220 is a wasteful number, since it uses less digits than its factorization.

102012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100620 (or 5100618 counting only the distinct ones).

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

The square root of 102012220 is about 10100.1099003922. The cubic root of 102012220 is about 467.2515308673.

Adding to 102012220 its reverse (22210201), we get a palindrome (124222421).

It can be divided in two parts, 10201 and 2220, that added together give a palindrome (12421).

The spelling of 102012220 in words is "one hundred two million, twelve thousand, two hundred twenty".