211121101104101 has 2 divisors, whose sum is σ = 211121101104102. Its totient is φ = 211121101104100.

The previous prime is 211121101104083. The next prime is 211121101104167. The reversal of 211121101104101 is 101401101121112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168582334373476 + 42538766730625 = 12983926^2 + 6522175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211121101104101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211121101104101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211121101134101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560550552050 + 105560550552051.

It is an arithmetic number, because the mean of its divisors is an integer number (105560550552051).

Almost surely, 2^{211121101104101} is an apocalyptic number.

It is an amenable number.

211121101104101 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121101104101 is an equidigital number, since it uses as much as digits as its factorization.

211121101104101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 211121101104101 its reverse (101401101121112), we get a palindrome (312522202225213).

The spelling of 211121101104101 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred one million, one hundred four thousand, one hundred one".