11111331203 has 4 divisors (see below), whose sum is σ = 12698664240. Its totient is φ = 9523998168.

The previous prime is 11111331199. The next prime is 11111331229. The reversal of 11111331203 is 30213311111.

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 11111331203 - 2² = 11111331199 is a prime.

It is a super-2 number, since 2×11111331203² (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 (11111339203) 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, 793666508 + ... + 793666521.

It is an arithmetic number, because the mean of its divisors is an integer number (3174666060).

Almost surely, 2^11111331203 is an apocalyptic number.

11111331203 is a deficient number, since it is larger than the sum of its proper divisors (1587333037).

11111331203 is an equidigital number, since it uses as much as digits as its factorization.

11111331203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587333036.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11111331203 its reverse (30213311111), we get a palindrome (41324642314).

The spelling of 11111331203 in words is "eleven billion, one hundred eleven million, three hundred thirty-one thousand, two hundred three".