12102011231021 has 2 divisors, whose sum is σ = 12102011231022. Its totient is φ = 12102011231020.

The previous prime is 12102011231017. The next prime is 12102011231087. The reversal of 12102011231021 is 12013211020121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8535390128521 + 3566621102500 = 2921539^2 + 1888550^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102011231021 - 2² = 12102011231017 is a prime.

It is a super-3 number, since 3×12102011231021³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102011221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051005615510 + 6051005615511.

It is an arithmetic number, because the mean of its divisors is an integer number (6051005615511).

Almost surely, 2^{12102011231021} is an apocalyptic number.

It is an amenable number.

12102011231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102011231021 is an equidigital number, since it uses as much as digits as its factorization.

12102011231021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12102011231021 its reverse (12013211020121), we get a palindrome (24115222251142).

The spelling of 12102011231021 in words is "twelve trillion, one hundred two billion, eleven million, two hundred thirty-one thousand, twenty-one".