1220210220 has 96 divisors (see below), whose sum is σ = 3540418560. Its totient is φ = 313678080.

The previous prime is 1220210209. The next prime is 1220210227. The reversal of 1220210220 is 220120221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1220210196 and 1220210205.

It is not an unprimeable number, because it can be changed into a prime (1220210227) 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, 543861 + ... + 546099.

It is an arithmetic number, because the mean of its divisors is an integer number (36879360).

Almost surely, 2^1220210220 is an apocalyptic number.

1220210220 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 1220210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1770209280).

1220210220 is an abundant number, since it is smaller than the sum of its proper divisors (2320208340).

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

1220210220 is a wasteful number, since it uses less digits than its factorization.

1220210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575 (or 2573 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1220210220 is about 34931.5075540693. The cubic root of 1220210220 is about 1068.5910999355.

Adding to 1220210220 its reverse (220120221), we get a palindrome (1440330441).

It can be divided in two parts, 12202 and 10220, that added together give a palindrome (22422).

The spelling of 1220210220 in words is "one billion, two hundred twenty million, two hundred ten thousand, two hundred twenty".