211101120201161 has 2 divisors, whose sum is σ = 211101120201162. Its totient is φ = 211101120201160.

The previous prime is 211101120201113. The next prime is 211101120201173. The reversal of 211101120201161 is 161102021101112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199104629877136 + 11996490324025 = 14110444^2 + 3463595^2 .

It is a cyclic number.

It is not a de Polignac number, because 211101120201161 - 2²⁶ = 211101053092297 is a prime.

It is a super-2 number, since 2×211101120201161² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211101120201661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550560100580 + 105550560100581.

It is an arithmetic number, because the mean of its divisors is an integer number (105550560100581).

Almost surely, 2^{211101120201161} is an apocalyptic number.

It is an amenable number.

211101120201161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211101120201161 is an equidigital number, since it uses as much as digits as its factorization.

211101120201161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 20.

Adding to 211101120201161 its reverse (161102021101112), we get a palindrome (372203141302273).

The spelling of 211101120201161 in words is "two hundred eleven trillion, one hundred one billion, one hundred twenty million, two hundred one thousand, one hundred sixty-one".