11203320231 has 12 divisors (see below), whose sum is σ = 16183630008. Its totient is φ = 7468392624.

The previous prime is 11203320209. The next prime is 11203320239. The reversal of 11203320231 is 13202330211.

11203320231 is a `hidden beast` number, since 112 + 0 + 3 + 320 + 231 = 666.

It is not a de Polignac number, because 11203320231 - 2⁷ = 11203320103 is a prime.

It is a super-2 number, since 2×11203320231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203320239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153961 + ... + 214733.

It is an arithmetic number, because the mean of its divisors is an integer number (1348635834).

Almost surely, 2^11203320231 is an apocalyptic number.

11203320231 is a deficient number, since it is larger than the sum of its proper divisors (4980309777).

11203320231 is a wasteful number, since it uses less digits than its factorization.

11203320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81262 (or 81259 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 11203320231 its reverse (13202330211), we get a palindrome (24405650442).

The spelling of 11203320231 in words is "eleven billion, two hundred three million, three hundred twenty thousand, two hundred thirty-one".