1312230220 has 24 divisors (see below), whose sum is σ = 3149352864. Its totient is φ = 449907456.

The previous prime is 1312230209. The next prime is 1312230239. The reversal of 1312230220 is 220322131.

It is a junction number, because it is equal to n+sod(n) for n = 1312230194 and 1312230203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4686397 + ... + 4686676.

It is an arithmetic number, because the mean of its divisors is an integer number (131223036).

Almost surely, 2^1312230220 is an apocalyptic number.

1312230220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312230220 is an abundant number, since it is smaller than the sum of its proper divisors (1837122644).

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

1312230220 is a wasteful number, since it uses less digits than its factorization.

1312230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373089 (or 9373087 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1312230220 is about 36224.7183563931. The cubic root of 1312230220 is about 1094.8047635349.

Adding to 1312230220 its reverse (220322131), we get a palindrome (1532552351).

The spelling of 1312230220 in words is "one billion, three hundred twelve million, two hundred thirty thousand, two hundred twenty".