12102112210021 has 2 divisors, whose sum is σ = 12102112210022. Its totient is φ = 12102112210020.

The previous prime is 12102112209989. The next prime is 12102112210033. The reversal of 12102112210021 is 12001221120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10872484049025 + 1229628160996 = 3297345^2 + 1108886^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102112210021 - 2⁵ = 12102112209989 is a prime.

It is a super-2 number, since 2×12102112210021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12102112209977 and 12102112210004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102112210051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051056105010 + 6051056105011.

It is an arithmetic number, because the mean of its divisors is an integer number (6051056105011).

Almost surely, 2^{12102112210021} is an apocalyptic number.

It is an amenable number.

12102112210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102112210021 is an equidigital number, since it uses as much as digits as its factorization.

12102112210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12102112210021 its reverse (12001221120121), we get a palindrome (24103333330142).

The spelling of 12102112210021 in words is "twelve trillion, one hundred two billion, one hundred twelve million, two hundred ten thousand, twenty-one".