1203211313 has 4 divisors (see below), whose sum is σ = 1203505188. Its totient is φ = 1202917440.

The previous prime is 1203211291. The next prime is 1203211391. The reversal of 1203211313 is 3131123021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 360354289 + 842857024 = 18983^2 + 29032^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203211313 - 2¹² = 1203207217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203211291 and 1203211300.

It is not an unprimeable number, because it can be changed into a prime (1203211913) 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, 140708 + ... + 149013.

It is an arithmetic number, because the mean of its divisors is an integer number (300876297).

Almost surely, 2^1203211313 is an apocalyptic number.

It is an amenable number.

1203211313 is a deficient number, since it is larger than the sum of its proper divisors (293875).

1203211313 is an equidigital number, since it uses as much as digits as its factorization.

1203211313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293874.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1203211313 is about 34687.3364933083. The cubic root of 1203211313 is about 1063.6056496582.

Adding to 1203211313 its reverse (3131123021), we get a palindrome (4334334334).

The spelling of 1203211313 in words is "one billion, two hundred three million, two hundred eleven thousand, three hundred thirteen".