1220012313 has 32 divisors (see below), whose sum is σ = 1791283200. Its totient is φ = 734031936.

The previous prime is 1220012291. The next prime is 1220012329. The reversal of 1220012313 is 3132100221.

It is not a de Polignac number, because 1220012313 - 2⁹ = 1220011801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220012292 and 1220012301.

It is not an unprimeable number, because it can be changed into a prime (1220012333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361528 + ... + 364886.

It is an arithmetic number, because the mean of its divisors is an integer number (55977600).

Almost surely, 2^1220012313 is an apocalyptic number.

1220012313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220012313 is a deficient number, since it is larger than the sum of its proper divisors (571270887).

1220012313 is a wasteful number, since it uses less digits than its factorization.

1220012313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581.

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

The square root of 1220012313 is about 34928.6746527835. The cubic root of 1220012313 is about 1068.5333248927.

Adding to 1220012313 its reverse (3132100221), we get a palindrome (4352112534).

The spelling of 1220012313 in words is "one billion, two hundred twenty million, twelve thousand, three hundred thirteen".