2201211122161 has 2 divisors, whose sum is σ = 2201211122162. Its totient is φ = 2201211122160.

The previous prime is 2201211122153. The next prime is 2201211122203. The reversal of 2201211122161 is 1612211121022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2009646464400 + 191564657761 = 1417620^2 + 437681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201211122161 - 2³ = 2201211122153 is a prime.

It is not a weakly prime, because it can be changed into another prime (2201211122101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100605561080 + 1100605561081.

It is an arithmetic number, because the mean of its divisors is an integer number (1100605561081).

Almost surely, 2^{2201211122161} is an apocalyptic number.

It is an amenable number.

2201211122161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201211122161 is an equidigital number, since it uses as much as digits as its factorization.

2201211122161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 2201211122161 its reverse (1612211121022), we get a palindrome (3813422243183).

The spelling of 2201211122161 in words is "two trillion, two hundred one billion, two hundred eleven million, one hundred twenty-two thousand, one hundred sixty-one".