12021011011231 has 2 divisors, whose sum is σ = 12021011011232. Its totient is φ = 12021011011230.

The previous prime is 12021011011201. The next prime is 12021011011259. The reversal of 12021011011231 is 13211011012021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021011011231 - 2⁹ = 12021011010719 is a prime.

It is a super-2 number, since 2×12021011011231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021011011201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010505505615 + 6010505505616.

It is an arithmetic number, because the mean of its divisors is an integer number (6010505505616).

Almost surely, 2^{12021011011231} is an apocalyptic number.

12021011011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021011011231 is an equidigital number, since it uses as much as digits as its factorization.

12021011011231 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12021011011231 its reverse (13211011012021), we get a palindrome (25232022023252).

The spelling of 12021011011231 in words is "twelve trillion, twenty-one billion, eleven million, eleven thousand, two hundred thirty-one".