11211310231 has 16 divisors (see below), whose sum is σ = 12734247456. Its totient is φ = 9780480000.

The previous prime is 11211310217. The next prime is 11211310249. The reversal of 11211310231 is 13201311211.

It is a happy number.

11211310231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211310231 is a prime.

It is a super-2 number, since 2×11211310231² (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 (11211310291) 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, 176250 + ... + 231271.

It is an arithmetic number, because the mean of its divisors is an integer number (795890466).

Almost surely, 2^11211310231 is an apocalyptic number.

11211310231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11211310231 is a deficient number, since it is larger than the sum of its proper divisors (1522937225).

11211310231 is a wasteful number, since it uses less digits than its factorization.

11211310231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407634.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11211310231 its reverse (13201311211), we get a palindrome (24412621442).

The spelling of 11211310231 in words is "eleven billion, two hundred eleven million, three hundred ten thousand, two hundred thirty-one".