11213211231 has 12 divisors (see below), whose sum is σ = 16634614152. Its totient is φ = 7273434096.

The previous prime is 11213211143. The next prime is 11213211277. The reversal of 11213211231 is 13211231211.

11213211231 is a `hidden beast` number, since 11 + 213 + 211 + 231 = 666.

11213211231 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 11213211231 - 2⁷ = 11213211103 is a prime.

It is a super-2 number, since 2×11213211231² (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 (11213211631) 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 11 ways as a sum of consecutive naturals, for example, 16836321 + ... + 16836986.

It is an arithmetic number, because the mean of its divisors is an integer number (1386217846).

Almost surely, 2^11213211231 is an apocalyptic number.

11213211231 is a deficient number, since it is larger than the sum of its proper divisors (5421402921).

11213211231 is a wasteful number, since it uses less digits than its factorization.

11213211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33673350 (or 33673347 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11213211231 its reverse (13211231211), we get a palindrome (24424442442).

The spelling of 11213211231 in words is "eleven billion, two hundred thirteen million, two hundred eleven thousand, two hundred thirty-one".