1220322012 has 96 divisors (see below), whose sum is σ = 3599350272. Its totient is φ = 313134336.

The previous prime is 1220322007. The next prime is 1220322043. The reversal of 1220322012 is 2102230221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220321982 and 1220322000.

It is a congruent number.

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, 25303 + ... + 55505.

It is an arithmetic number, because the mean of its divisors is an integer number (37493232).

Almost surely, 2^1220322012 is an apocalyptic number.

1220322012 is a gapful number since it is divisible by the number (12) 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 1220322012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1799675136).

1220322012 is an abundant number, since it is smaller than the sum of its proper divisors (2379028260).

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

1220322012 is a wasteful number, since it uses less digits than its factorization.

1220322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30267 (or 30265 counting only the distinct ones).

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

The square root of 1220322012 is about 34933.1076773882. The cubic root of 1220322012 is about 1068.6237326427.

Adding to 1220322012 its reverse (2102230221), we get a palindrome (3322552233).

The spelling of 1220322012 in words is "one billion, two hundred twenty million, three hundred twenty-two thousand, twelve".