1011210117161 has 2 divisors, whose sum is σ = 1011210117162. Its totient is φ = 1011210117160.

The previous prime is 1011210117157. The next prime is 1011210117191. The reversal of 1011210117161 is 1617110121101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 910032049936 + 101178067225 = 953956^2 + 318085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011210117161 - 2² = 1011210117157 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011210117101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605058580 + 505605058581.

It is an arithmetic number, because the mean of its divisors is an integer number (505605058581).

Almost surely, 2^{1011210117161} is an apocalyptic number.

It is an amenable number.

1011210117161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011210117161 is an equidigital number, since it uses as much as digits as its factorization.

1011210117161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 23.

Adding to 1011210117161 its reverse (1617110121101), we get a palindrome (2628320238262).

The spelling of 1011210117161 in words is "one trillion, eleven billion, two hundred ten million, one hundred seventeen thousand, one hundred sixty-one".