10211121020161 has 2 divisors, whose sum is σ = 10211121020162. Its totient is φ = 10211121020160.

The previous prime is 10211121020047. The next prime is 10211121020257. The reversal of 10211121020161 is 16102012111201.

10211121020161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6619171200625 + 3591949819536 = 2572775^2 + 1895244^2 .

It is an emirp because it is prime and its reverse (16102012111201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211121020161 is a prime.

It is not a weakly prime, because it can be changed into another prime (10211121021161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105560510080 + 5105560510081.

It is an arithmetic number, because the mean of its divisors is an integer number (5105560510081).

Almost surely, 2^{10211121020161} is an apocalyptic number.

It is an amenable number.

10211121020161 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211121020161 is an equidigital number, since it uses as much as digits as its factorization.

10211121020161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 10211121020161 its reverse (16102012111201), we get a palindrome (26313133131362).

The spelling of 10211121020161 in words is "ten trillion, two hundred eleven billion, one hundred twenty-one million, twenty thousand, one hundred sixty-one".