210201111121 has 2 divisors, whose sum is σ = 210201111122. Its totient is φ = 210201111120.

The previous prime is 210201111103. The next prime is 210201111143. The reversal of 210201111121 is 121111102012.

It is a happy number.

210201111121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134366966721 + 75834144400 = 366561^2 + 275380^2 .

It is a cyclic number.

It is not a de Polignac number, because 210201111121 - 2⁷ = 210201110993 is a prime.

It is not a weakly prime, because it can be changed into another prime (210201111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100555560 + 105100555561.

It is an arithmetic number, because the mean of its divisors is an integer number (105100555561).

Almost surely, 2^210201111121 is an apocalyptic number.

It is an amenable number.

210201111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210201111121 is an equidigital number, since it uses as much as digits as its factorization.

210201111121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 210201111121 its reverse (121111102012), we get a palindrome (331312213133).

The spelling of 210201111121 in words is "two hundred ten billion, two hundred one million, one hundred eleven thousand, one hundred twenty-one".