120947221 has 2 divisors, whose sum is σ = 120947222. Its totient is φ = 120947220.

The previous prime is 120947161. The next prime is 120947237. The reversal of 120947221 is 122749021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120692196 + 255025 = 10986^2 + 505^2 .

It is an emirp because it is prime and its reverse (122749021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120947221 - 2¹¹ = 120945173 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120947221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120947251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60473610 + 60473611.

It is an arithmetic number, because the mean of its divisors is an integer number (60473611).

Almost surely, 2^120947221 is an apocalyptic number.

It is an amenable number.

120947221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120947221 is an equidigital number, since it uses as much as digits as its factorization.

120947221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 120947221 is about 10997.6006928784. The cubic root of 120947221 is about 494.5368193899.

The spelling of 120947221 in words is "one hundred twenty million, nine hundred forty-seven thousand, two hundred twenty-one".