121211200201121 has 2 divisors, whose sum is σ = 121211200201122. Its totient is φ = 121211200201120.

The previous prime is 121211200201093. The next prime is 121211200201187. The reversal of 121211200201121 is 121102002112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101431486542400 + 19779713658721 = 10071320^2 + 4447439^2 .

It is an emirp because it is prime and its reverse (121102002112121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121211200201121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121211200201121.

It is not a weakly prime, because it can be changed into another prime (121211200207121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605600100560 + 60605600100561.

It is an arithmetic number, because the mean of its divisors is an integer number (60605600100561).

Almost surely, 2^{121211200201121} is an apocalyptic number.

It is an amenable number.

121211200201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211200201121 is an equidigital number, since it uses as much as digits as its factorization.

121211200201121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121211200201121 its reverse (121102002112121), we get a palindrome (242313202313242).

The spelling of 121211200201121 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred million, two hundred one thousand, one hundred twenty-one".