1222210220 has 96 divisors (see below), whose sum is σ = 3310433280. Its totient is φ = 367799040.

The previous prime is 1222210217. The next prime is 1222210229. The reversal of 1222210220 is 220122221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1222210195 and 1222210204.

It is not an unprimeable number, because it can be changed into a prime (1222210229) 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, 30977 + ... + 58343.

It is an arithmetic number, because the mean of its divisors is an integer number (34483680).

Almost surely, 2^1222210220 is an apocalyptic number.

1222210220 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 1222210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655216640).

1222210220 is an abundant number, since it is smaller than the sum of its proper divisors (2088223060).

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

1222210220 is a wasteful number, since it uses less digits than its factorization.

1222210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27423 (or 27421 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1222210220 is about 34960.1232835355. The cubic root of 1222210220 is about 1069.1746102108.

Adding to 1222210220 its reverse (220122221), we get a palindrome (1442332441).

The spelling of 1222210220 in words is "one billion, two hundred twenty-two million, two hundred ten thousand, two hundred twenty".