1220320122 has 64 divisors (see below), whose sum is σ = 2836485120. Its totient is φ = 342797184.

The previous prime is 1220320121. The next prime is 1220320147. The reversal of 1220320122 is 2210230221.

It is a happy number.

It is a super-3 number, since 3×1220320122³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220320121) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1897533 + ... + 1898175.

It is an arithmetic number, because the mean of its divisors is an integer number (44320080).

Almost surely, 2^1220320122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220320122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418242560).

1220320122 is an abundant number, since it is smaller than the sum of its proper divisors (1616164998).

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

1220320122 is a wasteful number, since it uses less digits than its factorization.

1220320122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1220320122 is about 34933.0806256763. The cubic root of 1220320122 is about 1068.6231809577.

Adding to 1220320122 its reverse (2210230221), we get a palindrome (3430550343).

The spelling of 1220320122 in words is "one billion, two hundred twenty million, three hundred twenty thousand, one hundred twenty-two".