1110220121161 has 2 divisors, whose sum is σ = 1110220121162. Its totient is φ = 1110220121160.

The previous prime is 1110220121093. The next prime is 1110220121233. The reversal of 1110220121161 is 1611210220111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110072960000 + 147161161 = 1053600^2 + 12131^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110220121161 - 2²¹ = 1110218024009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1110220121261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555110060580 + 555110060581.

It is an arithmetic number, because the mean of its divisors is an integer number (555110060581).

Almost surely, 2^{1110220121161} is an apocalyptic number.

It is an amenable number.

1110220121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110220121161 is an equidigital number, since it uses as much as digits as its factorization.

1110220121161 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 1110220121161 its reverse (1611210220111), we get a palindrome (2721430341272).

The spelling of 1110220121161 in words is "one trillion, one hundred ten billion, two hundred twenty million, one hundred twenty-one thousand, one hundred sixty-one".