1011210110161 has 2 divisors, whose sum is σ = 1011210110162. Its totient is φ = 1011210110160.

The previous prime is 1011210110159. The next prime is 1011210110293. The reversal of 1011210110161 is 1610110121101.

1011210110161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 816249006225 + 194961103936 = 903465^2 + 441544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011210110161 - 2¹ = 1011210110159 is a prime.

It is a super-3 number, since 3×1011210110161³ (a number of 37 digits) contains 333 as substring.

Together with 1011210110159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1011210117161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605055080 + 505605055081.

It is an arithmetic number, because the mean of its divisors is an integer number (505605055081).

Almost surely, 2^{1011210110161} is an apocalyptic number.

It is an amenable number.

1011210110161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011210110161 is an equidigital number, since it uses as much as digits as its factorization.

1011210110161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 1011210110161 its reverse (1610110121101), we get a palindrome (2621320231262).

The spelling of 1011210110161 in words is "one trillion, eleven billion, two hundred ten million, one hundred ten thousand, one hundred sixty-one".