221120120001161 has 2 divisors, whose sum is σ = 221120120001162. Its totient is φ = 221120120001160.

The previous prime is 221120120001149. The next prime is 221120120001227. The reversal of 221120120001161 is 161100021021122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216353386609936 + 4766733391225 = 14708956^2 + 2183285^2 .

It is a cyclic number.

It is not a de Polignac number, because 221120120001161 - 2³⁰ = 221119046259337 is a prime.

It is not a weakly prime, because it can be changed into another prime (221120120091161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560060000580 + 110560060000581.

It is an arithmetic number, because the mean of its divisors is an integer number (110560060000581).

Almost surely, 2^{221120120001161} is an apocalyptic number.

It is an amenable number.

221120120001161 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120120001161 is an equidigital number, since it uses as much as digits as its factorization.

221120120001161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 221120120001161 its reverse (161100021021122), we get a palindrome (382220141022283).

The spelling of 221120120001161 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred twenty million, one thousand, one hundred sixty-one".