1220321130 has 128 divisors (see below), whose sum is σ = 3448037376. Its totient is φ = 270604800.

The previous prime is 1220321101. The next prime is 1220321177. The reversal of 1220321130 is 311230221.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2333049 + ... + 2333571.

It is an arithmetic number, because the mean of its divisors is an integer number (26937792).

Almost surely, 2^1220321130 is an apocalyptic number.

1220321130 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 1220321130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1724018688).

1220321130 is an abundant number, since it is smaller than the sum of its proper divisors (2227716246).

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

1220321130 is a wasteful number, since it uses less digits than its factorization.

1220321130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1220321130 is about 34933.0950532586. The cubic root of 1220321130 is about 1068.6234751898.

Adding to 1220321130 its reverse (311230221), we get a palindrome (1531551351).

Subtracting from 1220321130 its reverse (311230221), we obtain a palindrome (909090909).

It can be divided in two parts, 12203 and 21130, that added together give a palindrome (33333).

The spelling of 1220321130 in words is "one billion, two hundred twenty million, three hundred twenty-one thousand, one hundred thirty".