12011112211231 has 4 divisors (see below), whose sum is σ = 13726985384272. Its totient is φ = 10295239038192.

The previous prime is 12011112211213. The next prime is 12011112211243. The reversal of 12011112211231 is 13211221111021.

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 12011112211231 - 2¹⁷ = 12011112080159 is a prime.

It is a super-2 number, since 2×12011112211231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011112211199 and 12011112211208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011113211231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857936586510 + ... + 857936586523.

It is an arithmetic number, because the mean of its divisors is an integer number (3431746346068).

Almost surely, 2^{12011112211231} is an apocalyptic number.

12011112211231 is a deficient number, since it is larger than the sum of its proper divisors (1715873173041).

12011112211231 is an equidigital number, since it uses as much as digits as its factorization.

12011112211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715873173040.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 12011112211231 its reverse (13211221111021), we get a palindrome (25222333322252).

The spelling of 12011112211231 in words is "twelve trillion, eleven billion, one hundred twelve million, two hundred eleven thousand, two hundred thirty-one".