12011212213231 has 8 divisors (see below), whose sum is σ = 14975017824384. Its totient is φ = 9359386140120.

The previous prime is 12011212213223. The next prime is 12011212213243. The reversal of 12011212213231 is 13231221211021.

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 12011212213231 - 2³ = 12011212213223 is a prime.

It is a super-2 number, since 2×12011212213231² (a number of 27 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 (12011212213331) 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 7 ways as a sum of consecutive naturals, for example, 77994884425 + ... + 77994884578.

It is an arithmetic number, because the mean of its divisors is an integer number (1871877228048).

Almost surely, 2^{12011212213231} is an apocalyptic number.

12011212213231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12011212213231 is a deficient number, since it is larger than the sum of its proper divisors (2963805611153).

12011212213231 is a wasteful number, since it uses less digits than its factorization.

12011212213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155989769021.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12011212213231 its reverse (13231221211021), we get a palindrome (25242433424252).

The spelling of 12011212213231 in words is "twelve trillion, eleven billion, two hundred twelve million, two hundred thirteen thousand, two hundred thirty-one".