12011201010121 has 2 divisors, whose sum is σ = 12011201010122. Its totient is φ = 12011201010120.

The previous prime is 12011201010119. The next prime is 12011201010139. The reversal of 12011201010121 is 12101010211021.

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., 6382373584896 + 5628827425225 = 2526336^2 + 2372515^2 .

It is an emirp because it is prime and its reverse (12101010211021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12011201010121 - 2¹ = 12011201010119 is a prime.

Together with 12011201010119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12011201017121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005600505060 + 6005600505061.

It is an arithmetic number, because the mean of its divisors is an integer number (6005600505061).

Almost surely, 2^{12011201010121} is an apocalyptic number.

It is an amenable number.

12011201010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011201010121 is an equidigital number, since it uses as much as digits as its factorization.

12011201010121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12011201010121 its reverse (12101010211021), we get a palindrome (24112211221142).

The spelling of 12011201010121 in words is "twelve trillion, eleven billion, two hundred one million, ten thousand, one hundred twenty-one".