111211012231 has 8 divisors (see below), whose sum is σ = 122522304528. Its totient is φ = 100099920000.

The previous prime is 111211012207. The next prime is 111211012261. The reversal of 111211012231 is 132210112111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111211012231 - 2⁷ = 111211012103 is a prime.

It is a super-2 number, since 2×111211012231² (a number of 23 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 (111211012261) 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 7 ways as a sum of consecutive naturals, for example, 50048850 + ... + 50051071.

It is an arithmetic number, because the mean of its divisors is an integer number (15315288066).

Almost surely, 2^111211012231 is an apocalyptic number.

111211012231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111211012231 is a deficient number, since it is larger than the sum of its proper divisors (11311292297).

111211012231 is a wasteful number, since it uses less digits than its factorization.

111211012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100100033.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111211012231 its reverse (132210112111), we get a palindrome (243421124342).

The spelling of 111211012231 in words is "one hundred eleven billion, two hundred eleven million, twelve thousand, two hundred thirty-one".