12021311011231 has 12 divisors (see below), whose sum is σ = 12322070862192. Its totient is φ = 11727722000000.

The previous prime is 12021311011219. The next prime is 12021311011247. The reversal of 12021311011231 is 13211011312021.

It is not a de Polignac number, because 12021311011231 - 2¹⁹ = 12021310486943 is a prime.

It is a super-2 number, since 2×12021311011231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12021311011199 and 12021311011208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021311011261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60081606 + ... + 60281356.

It is an arithmetic number, because the mean of its divisors is an integer number (1026839238516).

Almost surely, 2^{12021311011231} is an apocalyptic number.

12021311011231 is a deficient number, since it is larger than the sum of its proper divisors (300759850961).

12021311011231 is an equidigital number, since it uses as much as digits as its factorization.

12021311011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235634 (or 235593 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 12021311011231 its reverse (13211011312021), we get a palindrome (25232322323252).

The spelling of 12021311011231 in words is "twelve trillion, twenty-one billion, three hundred eleven million, eleven thousand, two hundred thirty-one".