12101021005121 has 2 divisors, whose sum is σ = 12101021005122. Its totient is φ = 12101021005120.

The previous prime is 12101021005061. The next prime is 12101021005133. The reversal of 12101021005121 is 12150012010121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10330953072400 + 1770067932721 = 3214180^2 + 1330439^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101021005121 - 2¹⁸ = 12101020742977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12101021005121.

It is not a weakly prime, because it can be changed into another prime (12101021005141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050510502560 + 6050510502561.

It is an arithmetic number, because the mean of its divisors is an integer number (6050510502561).

Almost surely, 2^{12101021005121} is an apocalyptic number.

It is an amenable number.

12101021005121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101021005121 is an equidigital number, since it uses as much as digits as its factorization.

12101021005121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 12101021005121 its reverse (12150012010121), we get a palindrome (24251033015242).

The spelling of 12101021005121 in words is "twelve trillion, one hundred one billion, twenty-one million, five thousand, one hundred twenty-one".