211122101121161 has 2 divisors, whose sum is σ = 211122101121162. Its totient is φ = 211122101121160.

The previous prime is 211122101121097. The next prime is 211122101121223. The reversal of 211122101121161 is 161121101221112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207955694407561 + 3166406713600 = 14420669^2 + 1779440^2 .

It is a cyclic number.

It is not a de Polignac number, because 211122101121161 - 2⁶ = 211122101121097 is a prime.

It is not a weakly prime, because it can be changed into another prime (211122101121361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105561050560580 + 105561050560581.

It is an arithmetic number, because the mean of its divisors is an integer number (105561050560581).

Almost surely, 2^{211122101121161} is an apocalyptic number.

It is an amenable number.

211122101121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211122101121161 is an equidigital number, since it uses as much as digits as its factorization.

211122101121161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 23.

Adding to 211122101121161 its reverse (161121101221112), we get a palindrome (372243202342273).

The spelling of 211122101121161 in words is "two hundred eleven trillion, one hundred twenty-two billion, one hundred one million, one hundred twenty-one thousand, one hundred sixty-one".