2011112021161 has 2 divisors, whose sum is σ = 2011112021162. Its totient is φ = 2011112021160.

The previous prime is 2011112021153. The next prime is 2011112021179. The reversal of 2011112021161 is 1611202111102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121334862761 + 889777158400 = 1058931^2 + 943280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011112021161 - 2³ = 2011112021153 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011112028161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005556010580 + 1005556010581.

It is an arithmetic number, because the mean of its divisors is an integer number (1005556010581).

Almost surely, 2^{2011112021161} is an apocalyptic number.

It is an amenable number.

2011112021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011112021161 is an equidigital number, since it uses as much as digits as its factorization.

2011112021161 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 19.

Adding to 2011112021161 its reverse (1611202111102), we get a palindrome (3622314132263).

The spelling of 2011112021161 in words is "two trillion, eleven billion, one hundred twelve million, twenty-one thousand, one hundred sixty-one".