110021120161 has 2 divisors, whose sum is σ = 110021120162. Its totient is φ = 110021120160.

The previous prime is 110021120113. The next prime is 110021120171. The reversal of 110021120161 is 161021120011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84367011600 + 25654108561 = 290460^2 + 160169^2 .

It is a cyclic number.

It is not a de Polignac number, because 110021120161 - 2¹¹ = 110021118113 is a prime.

It is not a weakly prime, because it can be changed into another prime (110021120171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55010560080 + 55010560081.

It is an arithmetic number, because the mean of its divisors is an integer number (55010560081).

Almost surely, 2^110021120161 is an apocalyptic number.

It is an amenable number.

110021120161 is a deficient number, since it is larger than the sum of its proper divisors (1).

110021120161 is an equidigital number, since it uses as much as digits as its factorization.

110021120161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 110021120161 its reverse (161021120011), we get a palindrome (271042240172).

The spelling of 110021120161 in words is "one hundred ten billion, twenty-one million, one hundred twenty thousand, one hundred sixty-one".