1200220313 has 4 divisors (see below), whose sum is σ = 1200867108. Its totient is φ = 1199573520.

The previous prime is 1200220283. The next prime is 1200220321. The reversal of 1200220313 is 3130220021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3130220021 = 18049 ⋅173429.

It can be written as a sum of positive squares in 2 ways, for example, as 276789769 + 923430544 = 16637^2 + 30388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200220313 - 2⁸ = 1200220057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200220363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320606 + ... + 324327.

It is an arithmetic number, because the mean of its divisors is an integer number (300216777).

Almost surely, 2^1200220313 is an apocalyptic number.

It is an amenable number.

1200220313 is a deficient number, since it is larger than the sum of its proper divisors (646795).

1200220313 is an equidigital number, since it uses as much as digits as its factorization.

1200220313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646794.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1200220313 is about 34644.1959496825. The cubic root of 1200220313 is about 1062.7235978413.

Adding to 1200220313 its reverse (3130220021), we get a palindrome (4330440334).

The spelling of 1200220313 in words is "one billion, two hundred million, two hundred twenty thousand, three hundred thirteen".