12102221012121 has 12 divisors (see below), whose sum is σ = 17481067782100. Its totient is φ = 8068109552640.

The previous prime is 12102221012071. The next prime is 12102221012131. The reversal of 12102221012121 is 12121012220121.

It can be written as a sum of positive squares in 2 ways, for example, as 6727409375625 + 5374811636496 = 2593725^2 + 2318364^2 .

It is not a de Polignac number, because 12102221012121 - 2¹⁴ = 12102220995737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12102221012094 and 12102221012103.

It is not an unprimeable number, because it can be changed into a prime (12102221012131) 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 in 11 ways as a sum of consecutive naturals, for example, 1046896 + ... + 5029953.

Almost surely, 2^{12102221012121} is an apocalyptic number.

It is an amenable number.

12102221012121 is a deficient number, since it is larger than the sum of its proper divisors (5378846769979).

12102221012121 is a wasteful number, since it uses less digits than its factorization.

12102221012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6298136 (or 6298133 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12102221012121 its reverse (12121012220121), we get a palindrome (24223233232242).

The spelling of 12102221012121 in words is "twelve trillion, one hundred two billion, two hundred twenty-one million, twelve thousand, one hundred twenty-one".