12102221210021 has 2 divisors, whose sum is σ = 12102221210022. Its totient is φ = 12102221210020.

The previous prime is 12102221209979. The next prime is 12102221210029. The reversal of 12102221210021 is 12001212220121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6201524361796 + 5900696848225 = 2490286^2 + 2429135^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102221210021 - 2¹⁴ = 12102221193637 is a prime.

It is a super-4 number, since 4×12102221210021⁴ (a number of 53 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102221210029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051110605010 + 6051110605011.

It is an arithmetic number, because the mean of its divisors is an integer number (6051110605011).

Almost surely, 2^{12102221210021} is an apocalyptic number.

It is an amenable number.

12102221210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102221210021 is an equidigital number, since it uses as much as digits as its factorization.

12102221210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12102221210021 its reverse (12001212220121), we get a palindrome (24103433430142).

The spelling of 12102221210021 in words is "twelve trillion, one hundred two billion, two hundred twenty-one million, two hundred ten thousand, twenty-one".