1220220330 has 64 divisors (see below), whose sum is σ = 3376574208. Its totient is φ = 276433920.

The previous prime is 1220220319. The next prime is 1220220341. The reversal of 1220220330 is 330220221.

It is an interprime number because it is at equal distance from previous prime (1220220319) and next prime (1220220341).

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1981 + ... + 49440.

It is an arithmetic number, because the mean of its divisors is an integer number (52758972).

Almost surely, 2^1220220330 is an apocalyptic number.

1220220330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220220330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1688287104).

1220220330 is an abundant number, since it is smaller than the sum of its proper divisors (2156353878).

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

1220220330 is a wasteful number, since it uses less digits than its factorization.

1220220330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51551.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1220220330 is about 34931.6522655313. The cubic root of 1220220330 is about 1068.5940511828.

Adding to 1220220330 its reverse (330220221), we get a palindrome (1550440551).

The spelling of 1220220330 in words is "one billion, two hundred twenty million, two hundred twenty thousand, three hundred thirty".