1200320213 has 4 divisors (see below), whose sum is σ = 1200391788. Its totient is φ = 1200248640.

The previous prime is 1200320201. The next prime is 1200320221. The reversal of 1200320213 is 3120230021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3120230021 = 73 ⋅42742877.

It can be written as a sum of positive squares in 2 ways, for example, as 748460164 + 451860049 = 27358^2 + 21257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200320213 - 2⁸ = 1200319957 is a prime.

It is a super-2 number, since 2×1200320213² = 2881537227472730738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200320243) 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, 4445 + ... + 49197.

It is an arithmetic number, because the mean of its divisors is an integer number (300097947).

Almost surely, 2^1200320213 is an apocalyptic number.

It is an amenable number.

1200320213 is a deficient number, since it is larger than the sum of its proper divisors (71575).

1200320213 is an equidigital number, since it uses as much as digits as its factorization.

1200320213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71574.

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

The square root of 1200320213 is about 34645.6377196322. The cubic root of 1200320213 is about 1062.7530821898.

Adding to 1200320213 its reverse (3120230021), we get a palindrome (4320550234).

The spelling of 1200320213 in words is "one billion, two hundred million, three hundred twenty thousand, two hundred thirteen".