12002011531 has 2 divisors, whose sum is σ = 12002011532. Its totient is φ = 12002011530.

The previous prime is 12002011513. The next prime is 12002011591. The reversal of 12002011531 is 13511020021.

Together with previous prime (12002011513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12002011531 - 2¹⁵ = 12001978763 is a prime.

It is a super-2 number, since 2×12002011531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12002011591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001005765 + 6001005766.

It is an arithmetic number, because the mean of its divisors is an integer number (6001005766).

Almost surely, 2^12002011531 is an apocalyptic number.

12002011531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002011531 is an equidigital number, since it uses as much as digits as its factorization.

12002011531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 12002011531 its reverse (13511020021), we get a palindrome (25513031552).

The spelling of 12002011531 in words is "twelve billion, two million, eleven thousand, five hundred thirty-one".