11130031231 has 4 divisors (see below), whose sum is σ = 12141852264. Its totient is φ = 10118210200.

The previous prime is 11130031201. The next prime is 11130031247. The reversal of 11130031231 is 13213003111.

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 11130031231 - 2³¹ = 8982547583 is a prime.

It is a super-2 number, since 2×11130031231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11130031201) 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, 505910500 + ... + 505910521.

It is an arithmetic number, because the mean of its divisors is an integer number (3035463066).

Almost surely, 2^11130031231 is an apocalyptic number.

11130031231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11130031231 is a deficient number, since it is larger than the sum of its proper divisors (1011821033).

11130031231 is a wasteful number, since it uses less digits than its factorization.

11130031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011821032.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 11130031231 its reverse (13213003111), we get a palindrome (24343034342).

The spelling of 11130031231 in words is "eleven billion, one hundred thirty million, thirty-one thousand, two hundred thirty-one".