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1120111981 is a prime number
BaseRepresentation
bin100001011000011…
…1000110101101101
32220001200120202221
41002300320311231
54243222040411
6303051515341
736520536412
oct10260706555
92801616687
101120111981
1152530178a
12273158b51
1314b0a3071
14a8a96109
156850a071
hex42c38d6d

1120111981 has 2 divisors, whose sum is σ = 1120111982. Its totient is φ = 1120111980.

The previous prime is 1120111973. The next prime is 1120112009. The reversal of 1120111981 is 1891110211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 702727081 + 417384900 = 26509^2 + 20430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120111981 - 23 = 1120111973 is a prime.

It is a super-2 number, since 2×11201119812 = 2509301699959488722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1120111931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560055990 + 560055991.

It is an arithmetic number, because the mean of its divisors is an integer number (560055991).

Almost surely, 21120111981 is an apocalyptic number.

It is an amenable number.

1120111981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1120111981 is an equidigital number, since it uses as much as digits as its factorization.

1120111981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 25.

The square root of 1120111981 is about 33468.0740557326. The cubic root of 1120111981 is about 1038.5334299717.

The spelling of 1120111981 in words is "one billion, one hundred twenty million, one hundred eleven thousand, nine hundred eighty-one".