201110211001001 has 2 divisors, whose sum is σ = 201110211001002. Its totient is φ = 201110211001000.

The previous prime is 201110211000997. The next prime is 201110211001003. The reversal of 201110211001001 is 100100112011102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123917750467225 + 77192460533776 = 11131835^2 + 8785924^2 .

It is a cyclic number.

It is not a de Polignac number, because 201110211001001 - 2² = 201110211000997 is a prime.

Together with 201110211001003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201110211001003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555105500500 + 100555105500501.

It is an arithmetic number, because the mean of its divisors is an integer number (100555105500501).

Almost surely, 2^{201110211001001} is an apocalyptic number.

It is an amenable number.

201110211001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201110211001001 is an equidigital number, since it uses as much as digits as its factorization.

201110211001001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 201110211001001 its reverse (100100112011102), we get a palindrome (301210323012103).

The spelling of 201110211001001 in words is "two hundred one trillion, one hundred ten billion, two hundred eleven million, one thousand, one".