120221000173 has 2 divisors, whose sum is σ = 120221000174. Its totient is φ = 120221000172.

The previous prime is 120221000167. The next prime is 120221000203. The reversal of 120221000173 is 371000122021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113999419044 + 6221581129 = 337638^2 + 78877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120221000173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120221000173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120221000113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60110500086 + 60110500087.

It is an arithmetic number, because the mean of its divisors is an integer number (60110500087).

Almost surely, 2^120221000173 is an apocalyptic number.

It is an amenable number.

120221000173 is a deficient number, since it is larger than the sum of its proper divisors (1).

120221000173 is an equidigital number, since it uses as much as digits as its factorization.

120221000173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 120221000173 its reverse (371000122021), we get a palindrome (491221122194).

The spelling of 120221000173 in words is "one hundred twenty billion, two hundred twenty-one million, one hundred seventy-three", and thus it is an aban number.