11312004203 has 4 divisors (see below), whose sum is σ = 11313809760. Its totient is φ = 11310198648.

The previous prime is 11312004163. The next prime is 11312004211. The reversal of 11312004203 is 30240021311.

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

It is a cyclic number.

It is not a de Polignac number, because 11312004203 - 2⁸ = 11312003947 is a prime.

It is a super-2 number, since 2×11312004203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11312003203) 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, 893348 + ... + 905921.

It is an arithmetic number, because the mean of its divisors is an integer number (2828452440).

Almost surely, 2^11312004203 is an apocalyptic number.

11312004203 is a deficient number, since it is larger than the sum of its proper divisors (1805557).

11312004203 is an equidigital number, since it uses as much as digits as its factorization.

11312004203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805556.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 11312004203 its reverse (30240021311), we get a palindrome (41552025514).

The spelling of 11312004203 in words is "eleven billion, three hundred twelve million, four thousand, two hundred three".