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1112020981 is a prime number
BaseRepresentation
bin100001001001000…
…0001011111110101
32212111110112000021
41002102001133311
54234134132411
6302202245141
736362010451
oct10222013765
92774415007
101112020981
11520785905
122704b67b1
131494cc3a6
14a798b661
156795ca71
hex424817f5

1112020981 has 2 divisors, whose sum is σ = 1112020982. Its totient is φ = 1112020980.

The previous prime is 1112020963. The next prime is 1112021011. The reversal of 1112020981 is 1890202111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 916272900 + 195748081 = 30270^2 + 13991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112020981 - 223 = 1103632373 is a prime.

It is a super-2 number, since 2×11120209812 = 2473181324368404722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112020181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556010490 + 556010491.

It is an arithmetic number, because the mean of its divisors is an integer number (556010491).

Almost surely, 21112020981 is an apocalyptic number.

It is an amenable number.

1112020981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112020981 is an equidigital number, since it uses as much as digits as its factorization.

1112020981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 1112020981 is about 33346.9785887717. The cubic root of 1112020981 is about 1036.0268092450.

The spelling of 1112020981 in words is "one billion, one hundred twelve million, twenty thousand, nine hundred eighty-one".