11031213231 has 16 divisors (see below), whose sum is σ = 16414540800. Its totient is φ = 7321740984.

The previous prime is 11031213217. The next prime is 11031213239. The reversal of 11031213231 is 13231213011.

11031213231 is a `hidden beast` number, since 110 + 312 + 13 + 231 = 666.

11031213231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11031213231 - 2⁵ = 11031213199 is a prime.

It is a super-2 number, since 2×11031213231² (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 (11031213239) 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 15 ways as a sum of consecutive naturals, for example, 893791 + ... + 906048.

It is an arithmetic number, because the mean of its divisors is an integer number (1025908800).

Almost surely, 2^11031213231 is an apocalyptic number.

11031213231 is a deficient number, since it is larger than the sum of its proper divisors (5383327569).

11031213231 is a wasteful number, since it uses less digits than its factorization.

11031213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800075 (or 1800069 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11031213231 its reverse (13231213011), we get a palindrome (24262426242).

The spelling of 11031213231 in words is "eleven billion, thirty-one million, two hundred thirteen thousand, two hundred thirty-one".