120221121122161 has 2 divisors, whose sum is σ = 120221121122162. Its totient is φ = 120221121122160.

The previous prime is 120221121122147. The next prime is 120221121122227. The reversal of 120221121122161 is 161221121122021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111765471342561 + 8455649779600 = 10571919^2 + 2907860^2 .

It is a cyclic number.

It is not a de Polignac number, because 120221121122161 - 2⁷ = 120221121122033 is a prime.

It is not a weakly prime, because it can be changed into another prime (120221121122461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60110560561080 + 60110560561081.

It is an arithmetic number, because the mean of its divisors is an integer number (60110560561081).

Almost surely, 2^{120221121122161} is an apocalyptic number.

It is an amenable number.

120221121122161 is a deficient number, since it is larger than the sum of its proper divisors (1).

120221121122161 is an equidigital number, since it uses as much as digits as its factorization.

120221121122161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 25.

Adding to 120221121122161 its reverse (161221121122021), we get a palindrome (281442242244182).

The spelling of 120221121122161 in words is "one hundred twenty trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred sixty-one".