1220331012 has 48 divisors (see below), whose sum is σ = 3035289600. Its totient is φ = 380484000.

The previous prime is 1220331001. The next prime is 1220331017. The reversal of 1220331012 is 2101330221.

It is a junction number, because it is equal to n+sod(n) for n = 1220330982 and 1220331000.

It is not an unprimeable number, because it can be changed into a prime (1220331017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15864 + ... + 51887.

It is an arithmetic number, because the mean of its divisors is an integer number (63235200).

Almost surely, 2^1220331012 is an apocalyptic number.

1220331012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220331012 is an abundant number, since it is smaller than the sum of its proper divisors (1814958588).

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

1220331012 is a wasteful number, since it uses less digits than its factorization.

1220331012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67856 (or 67854 counting only the distinct ones).

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

The square root of 1220331012 is about 34933.2364947767. The cubic root of 1220331012 is about 1068.6263597061.

Adding to 1220331012 its reverse (2101330221), we get a palindrome (3321661233).

The spelling of 1220331012 in words is "one billion, two hundred twenty million, three hundred thirty-one thousand, twelve".