1203312113 has 4 divisors (see below), whose sum is σ = 1235834100. Its totient is φ = 1170790128.

The previous prime is 1203312107. The next prime is 1203312119. The reversal of 1203312113 is 3112133021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3112133021 = 313 ⋅9942917.

It is an interprime number because it is at equal distance from previous prime (1203312107) and next prime (1203312119).

It can be written as a sum of positive squares in 2 ways, for example, as 574656784 + 628655329 = 23972^2 + 25073^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203312113 - 2¹² = 1203308017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203312091 and 1203312100.

It is not an unprimeable number, because it can be changed into a prime (1203312119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16260938 + ... + 16261011.

It is an arithmetic number, because the mean of its divisors is an integer number (308958525).

Almost surely, 2^1203312113 is an apocalyptic number.

It is an amenable number.

1203312113 is a deficient number, since it is larger than the sum of its proper divisors (32521987).

1203312113 is an equidigital number, since it uses as much as digits as its factorization.

1203312113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32521986.

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

The square root of 1203312113 is about 34688.7894427004. The cubic root of 1203312113 is about 1063.6353503031.

Adding to 1203312113 its reverse (3112133021), we get a palindrome (4315445134).

The spelling of 1203312113 in words is "one billion, two hundred three million, three hundred twelve thousand, one hundred thirteen".