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122266181 is a prime number
BaseRepresentation
bin1110100100110…
…10001001000101
322112001202200002
413102122021011
5222300004211
620044331045
73013150112
oct722321105
9275052602
10122266181
116301a434
1234b43a85
131c43b56b
1412349909
15ab0203b
hex749a245

122266181 has 2 divisors, whose sum is σ = 122266182. Its totient is φ = 122266180.

The previous prime is 122266169. The next prime is 122266213. The reversal of 122266181 is 181662221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120802081 + 1464100 = 10991^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 122266181 - 214 = 122249797 is a prime.

It is a super-2 number, since 2×1222661812 = 29898038032649522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122266681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61133090 + 61133091.

It is an arithmetic number, because the mean of its divisors is an integer number (61133091).

Almost surely, 2122266181 is an apocalyptic number.

It is an amenable number.

122266181 is a deficient number, since it is larger than the sum of its proper divisors (1).

122266181 is an equidigital number, since it uses as much as digits as its factorization.

122266181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 122266181 is about 11057.4038996502. The cubic root of 122266181 is about 496.3280069493.

The spelling of 122266181 in words is "one hundred twenty-two million, two hundred sixty-six thousand, one hundred eighty-one".