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120765221 is a prime number
BaseRepresentation
bin1110011001010…
…11101100100101
322102020111201222
413030223230211
5221403441341
615552230125
72664326123
oct714535445
9272214658
10120765221
1162194775
123453b345
131c034315
1412078913
15a90744b
hex732bb25

120765221 has 2 divisors, whose sum is σ = 120765222. Its totient is φ = 120765220.

The previous prime is 120765179. The next prime is 120765223. The reversal of 120765221 is 122567021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119793025 + 972196 = 10945^2 + 986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-120765221 is a prime.

Together with 120765223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120765223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60382610 + 60382611.

It is an arithmetic number, because the mean of its divisors is an integer number (60382611).

Almost surely, 2120765221 is an apocalyptic number.

It is an amenable number.

120765221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120765221 is an equidigital number, since it uses as much as digits as its factorization.

120765221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 120765221 is about 10989.3230455747. The cubic root of 120765221 is about 494.2886370707.

The spelling of 120765221 in words is "one hundred twenty million, seven hundred sixty-five thousand, two hundred twenty-one".